Graphics.Rasterific.Svg.PathConverter:segmentToBezier from rasterific-svg-0.2.3.1, A

Percentage Accurate: 76.9% → 99.5%
Time: 12.7s
Alternatives: 10
Speedup: 1.5×

Specification

?
\[\begin{array}{l} \\ \begin{array}{l} t_0 := \sin \left(x \cdot 0.5\right)\\ \frac{\left(\frac{8}{3} \cdot t_0\right) \cdot t_0}{\sin x} \end{array} \end{array} \]
(FPCore (x)
 :precision binary64
 (let* ((t_0 (sin (* x 0.5)))) (/ (* (* (/ 8.0 3.0) t_0) t_0) (sin x))))
double code(double x) {
	double t_0 = sin((x * 0.5));
	return (((8.0 / 3.0) * t_0) * t_0) / sin(x);
}
real(8) function code(x)
    real(8), intent (in) :: x
    real(8) :: t_0
    t_0 = sin((x * 0.5d0))
    code = (((8.0d0 / 3.0d0) * t_0) * t_0) / sin(x)
end function
public static double code(double x) {
	double t_0 = Math.sin((x * 0.5));
	return (((8.0 / 3.0) * t_0) * t_0) / Math.sin(x);
}
def code(x):
	t_0 = math.sin((x * 0.5))
	return (((8.0 / 3.0) * t_0) * t_0) / math.sin(x)
function code(x)
	t_0 = sin(Float64(x * 0.5))
	return Float64(Float64(Float64(Float64(8.0 / 3.0) * t_0) * t_0) / sin(x))
end
function tmp = code(x)
	t_0 = sin((x * 0.5));
	tmp = (((8.0 / 3.0) * t_0) * t_0) / sin(x);
end
code[x_] := Block[{t$95$0 = N[Sin[N[(x * 0.5), $MachinePrecision]], $MachinePrecision]}, N[(N[(N[(N[(8.0 / 3.0), $MachinePrecision] * t$95$0), $MachinePrecision] * t$95$0), $MachinePrecision] / N[Sin[x], $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
t_0 := \sin \left(x \cdot 0.5\right)\\
\frac{\left(\frac{8}{3} \cdot t_0\right) \cdot t_0}{\sin x}
\end{array}
\end{array}

Sampling outcomes in binary64 precision:

Local Percentage Accuracy vs ?

The average percentage accuracy by input value. Horizontal axis shows value of an input variable; the variable is choosen in the title. Vertical axis is accuracy; higher is better. Red represent the original program, while blue represents Herbie's suggestion. These can be toggled with buttons below the plot. The line is an average while dots represent individual samples.

Accuracy vs Speed?

Herbie found 10 alternatives:

AlternativeAccuracySpeedup
The accuracy (vertical axis) and speed (horizontal axis) of each alternatives. Up and to the right is better. The red square shows the initial program, and each blue circle shows an alternative.The line shows the best available speed-accuracy tradeoffs.

Initial Program: 76.9% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \sin \left(x \cdot 0.5\right)\\ \frac{\left(\frac{8}{3} \cdot t_0\right) \cdot t_0}{\sin x} \end{array} \end{array} \]
(FPCore (x)
 :precision binary64
 (let* ((t_0 (sin (* x 0.5)))) (/ (* (* (/ 8.0 3.0) t_0) t_0) (sin x))))
double code(double x) {
	double t_0 = sin((x * 0.5));
	return (((8.0 / 3.0) * t_0) * t_0) / sin(x);
}
real(8) function code(x)
    real(8), intent (in) :: x
    real(8) :: t_0
    t_0 = sin((x * 0.5d0))
    code = (((8.0d0 / 3.0d0) * t_0) * t_0) / sin(x)
end function
public static double code(double x) {
	double t_0 = Math.sin((x * 0.5));
	return (((8.0 / 3.0) * t_0) * t_0) / Math.sin(x);
}
def code(x):
	t_0 = math.sin((x * 0.5))
	return (((8.0 / 3.0) * t_0) * t_0) / math.sin(x)
function code(x)
	t_0 = sin(Float64(x * 0.5))
	return Float64(Float64(Float64(Float64(8.0 / 3.0) * t_0) * t_0) / sin(x))
end
function tmp = code(x)
	t_0 = sin((x * 0.5));
	tmp = (((8.0 / 3.0) * t_0) * t_0) / sin(x);
end
code[x_] := Block[{t$95$0 = N[Sin[N[(x * 0.5), $MachinePrecision]], $MachinePrecision]}, N[(N[(N[(N[(8.0 / 3.0), $MachinePrecision] * t$95$0), $MachinePrecision] * t$95$0), $MachinePrecision] / N[Sin[x], $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
t_0 := \sin \left(x \cdot 0.5\right)\\
\frac{\left(\frac{8}{3} \cdot t_0\right) \cdot t_0}{\sin x}
\end{array}
\end{array}

Alternative 1: 99.5% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \sin \left(x \cdot -0.5\right)\\ \frac{t_0}{0.375 \cdot \frac{\sin x}{t_0}} \end{array} \end{array} \]
(FPCore (x)
 :precision binary64
 (let* ((t_0 (sin (* x -0.5)))) (/ t_0 (* 0.375 (/ (sin x) t_0)))))
double code(double x) {
	double t_0 = sin((x * -0.5));
	return t_0 / (0.375 * (sin(x) / t_0));
}
real(8) function code(x)
    real(8), intent (in) :: x
    real(8) :: t_0
    t_0 = sin((x * (-0.5d0)))
    code = t_0 / (0.375d0 * (sin(x) / t_0))
end function
public static double code(double x) {
	double t_0 = Math.sin((x * -0.5));
	return t_0 / (0.375 * (Math.sin(x) / t_0));
}
def code(x):
	t_0 = math.sin((x * -0.5))
	return t_0 / (0.375 * (math.sin(x) / t_0))
function code(x)
	t_0 = sin(Float64(x * -0.5))
	return Float64(t_0 / Float64(0.375 * Float64(sin(x) / t_0)))
end
function tmp = code(x)
	t_0 = sin((x * -0.5));
	tmp = t_0 / (0.375 * (sin(x) / t_0));
end
code[x_] := Block[{t$95$0 = N[Sin[N[(x * -0.5), $MachinePrecision]], $MachinePrecision]}, N[(t$95$0 / N[(0.375 * N[(N[Sin[x], $MachinePrecision] / t$95$0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
t_0 := \sin \left(x \cdot -0.5\right)\\
\frac{t_0}{0.375 \cdot \frac{\sin x}{t_0}}
\end{array}
\end{array}
Derivation
  1. Initial program 77.7%

    \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
  2. Step-by-step derivation
    1. associate-/l*99.2%

      \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
    2. associate-*r/99.2%

      \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
    3. metadata-eval99.2%

      \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
    4. associate-/l*77.7%

      \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
    5. sqr-neg77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
    6. sin-neg77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
    7. distribute-lft-neg-out77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
    8. sin-neg77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
    9. distribute-lft-neg-out77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
    10. associate-*r/99.3%

      \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
    11. distribute-lft-neg-out99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
    12. distribute-rgt-neg-in99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
    13. metadata-eval99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
    14. distribute-lft-neg-out99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
    15. distribute-rgt-neg-in99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
    16. metadata-eval99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
  3. Simplified99.3%

    \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
  4. Step-by-step derivation
    1. associate-*r/77.7%

      \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)}{\sin x}} \]
    2. associate-*r/77.7%

      \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)\right)}{\sin x}} \]
    3. sqr-sin-a48.7%

      \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(0.5 - 0.5 \cdot \cos \left(2 \cdot \left(x \cdot -0.5\right)\right)\right)}}{\sin x} \]
    4. add-sqr-sqrt16.5%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot -0.5} \cdot \sqrt{x \cdot -0.5}\right)}\right)\right)}{\sin x} \]
    5. sqrt-unprod27.1%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\sqrt{\left(x \cdot -0.5\right) \cdot \left(x \cdot -0.5\right)}}\right)\right)}{\sin x} \]
    6. swap-sqr27.1%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot x\right) \cdot \left(-0.5 \cdot -0.5\right)}}\right)\right)}{\sin x} \]
    7. metadata-eval27.1%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{0.25}}\right)\right)}{\sin x} \]
    8. metadata-eval27.1%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{\left(0.5 \cdot 0.5\right)}}\right)\right)}{\sin x} \]
    9. swap-sqr27.1%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot 0.5\right) \cdot \left(x \cdot 0.5\right)}}\right)\right)}{\sin x} \]
    10. sqrt-unprod16.3%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot 0.5} \cdot \sqrt{x \cdot 0.5}\right)}\right)\right)}{\sin x} \]
    11. add-sqr-sqrt48.7%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(x \cdot 0.5\right)}\right)\right)}{\sin x} \]
    12. sqr-sin-a77.7%

      \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
    13. associate-*l*77.7%

      \[\leadsto \frac{\color{blue}{\left(2.6666666666666665 \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}}{\sin x} \]
  5. Applied egg-rr99.6%

    \[\leadsto \color{blue}{\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \frac{\sin x}{\sin \left(x \cdot -0.5\right)}}} \]
  6. Final simplification99.6%

    \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \frac{\sin x}{\sin \left(x \cdot -0.5\right)}} \]

Alternative 2: 99.5% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;x \leq -0.01 \lor \neg \left(x \leq 0.0001\right):\\ \;\;\;\;2.6666666666666665 \cdot \frac{{\sin \left(x \cdot 0.5\right)}^{2}}{\sin x}\\ \mathbf{else}:\\ \;\;\;\;\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\ \end{array} \end{array} \]
(FPCore (x)
 :precision binary64
 (if (or (<= x -0.01) (not (<= x 0.0001)))
   (* 2.6666666666666665 (/ (pow (sin (* x 0.5)) 2.0) (sin x)))
   (/ (sin (* x -0.5)) (+ (* 0.375 (* x (* x 0.25))) -0.75))))
double code(double x) {
	double tmp;
	if ((x <= -0.01) || !(x <= 0.0001)) {
		tmp = 2.6666666666666665 * (pow(sin((x * 0.5)), 2.0) / sin(x));
	} else {
		tmp = sin((x * -0.5)) / ((0.375 * (x * (x * 0.25))) + -0.75);
	}
	return tmp;
}
real(8) function code(x)
    real(8), intent (in) :: x
    real(8) :: tmp
    if ((x <= (-0.01d0)) .or. (.not. (x <= 0.0001d0))) then
        tmp = 2.6666666666666665d0 * ((sin((x * 0.5d0)) ** 2.0d0) / sin(x))
    else
        tmp = sin((x * (-0.5d0))) / ((0.375d0 * (x * (x * 0.25d0))) + (-0.75d0))
    end if
    code = tmp
end function
public static double code(double x) {
	double tmp;
	if ((x <= -0.01) || !(x <= 0.0001)) {
		tmp = 2.6666666666666665 * (Math.pow(Math.sin((x * 0.5)), 2.0) / Math.sin(x));
	} else {
		tmp = Math.sin((x * -0.5)) / ((0.375 * (x * (x * 0.25))) + -0.75);
	}
	return tmp;
}
def code(x):
	tmp = 0
	if (x <= -0.01) or not (x <= 0.0001):
		tmp = 2.6666666666666665 * (math.pow(math.sin((x * 0.5)), 2.0) / math.sin(x))
	else:
		tmp = math.sin((x * -0.5)) / ((0.375 * (x * (x * 0.25))) + -0.75)
	return tmp
function code(x)
	tmp = 0.0
	if ((x <= -0.01) || !(x <= 0.0001))
		tmp = Float64(2.6666666666666665 * Float64((sin(Float64(x * 0.5)) ^ 2.0) / sin(x)));
	else
		tmp = Float64(sin(Float64(x * -0.5)) / Float64(Float64(0.375 * Float64(x * Float64(x * 0.25))) + -0.75));
	end
	return tmp
end
function tmp_2 = code(x)
	tmp = 0.0;
	if ((x <= -0.01) || ~((x <= 0.0001)))
		tmp = 2.6666666666666665 * ((sin((x * 0.5)) ^ 2.0) / sin(x));
	else
		tmp = sin((x * -0.5)) / ((0.375 * (x * (x * 0.25))) + -0.75);
	end
	tmp_2 = tmp;
end
code[x_] := If[Or[LessEqual[x, -0.01], N[Not[LessEqual[x, 0.0001]], $MachinePrecision]], N[(2.6666666666666665 * N[(N[Power[N[Sin[N[(x * 0.5), $MachinePrecision]], $MachinePrecision], 2.0], $MachinePrecision] / N[Sin[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[Sin[N[(x * -0.5), $MachinePrecision]], $MachinePrecision] / N[(N[(0.375 * N[(x * N[(x * 0.25), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + -0.75), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;x \leq -0.01 \lor \neg \left(x \leq 0.0001\right):\\
\;\;\;\;2.6666666666666665 \cdot \frac{{\sin \left(x \cdot 0.5\right)}^{2}}{\sin x}\\

\mathbf{else}:\\
\;\;\;\;\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if x < -0.0100000000000000002 or 1.00000000000000005e-4 < x

    1. Initial program 99.0%

      \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
    2. Simplified98.8%

      \[\leadsto \color{blue}{\sin \left(x \cdot 0.5\right) \cdot \left(\sin \left(x \cdot 0.5\right) \cdot \frac{2.6666666666666665}{\sin x}\right)} \]
    3. Taylor expanded in x around inf 98.9%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \frac{{\sin \left(0.5 \cdot x\right)}^{2}}{\sin x}} \]
    4. Step-by-step derivation
      1. *-commutative98.9%

        \[\leadsto 2.6666666666666665 \cdot \frac{{\sin \color{blue}{\left(x \cdot 0.5\right)}}^{2}}{\sin x} \]
    5. Simplified98.9%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \frac{{\sin \left(x \cdot 0.5\right)}^{2}}{\sin x}} \]

    if -0.0100000000000000002 < x < 1.00000000000000005e-4

    1. Initial program 59.2%

      \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
    2. Step-by-step derivation
      1. associate-/l*99.5%

        \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      2. associate-*r/99.5%

        \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      3. metadata-eval99.5%

        \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
      4. associate-/l*59.2%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
      5. sqr-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      6. sin-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      7. distribute-lft-neg-out59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      8. sin-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
      9. distribute-lft-neg-out59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
      10. associate-*r/99.5%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
      11. distribute-lft-neg-out99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      12. distribute-rgt-neg-in99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      13. metadata-eval99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      14. distribute-lft-neg-out99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
      15. distribute-rgt-neg-in99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
      16. metadata-eval99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
    3. Simplified99.5%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
    4. Step-by-step derivation
      1. associate-*r/59.2%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)}{\sin x}} \]
      2. associate-*r/59.1%

        \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)\right)}{\sin x}} \]
      3. sqr-sin-a5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(0.5 - 0.5 \cdot \cos \left(2 \cdot \left(x \cdot -0.5\right)\right)\right)}}{\sin x} \]
      4. add-sqr-sqrt2.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot -0.5} \cdot \sqrt{x \cdot -0.5}\right)}\right)\right)}{\sin x} \]
      5. sqrt-unprod5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\sqrt{\left(x \cdot -0.5\right) \cdot \left(x \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      6. swap-sqr5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot x\right) \cdot \left(-0.5 \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      7. metadata-eval5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{0.25}}\right)\right)}{\sin x} \]
      8. metadata-eval5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{\left(0.5 \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      9. swap-sqr5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot 0.5\right) \cdot \left(x \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      10. sqrt-unprod2.9%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot 0.5} \cdot \sqrt{x \cdot 0.5}\right)}\right)\right)}{\sin x} \]
      11. add-sqr-sqrt5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(x \cdot 0.5\right)}\right)\right)}{\sin x} \]
      12. sqr-sin-a59.1%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      13. associate-*l*59.2%

        \[\leadsto \frac{\color{blue}{\left(2.6666666666666665 \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}}{\sin x} \]
    5. Applied egg-rr100.0%

      \[\leadsto \color{blue}{\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \frac{\sin x}{\sin \left(x \cdot -0.5\right)}}} \]
    6. Taylor expanded in x around 0 100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(0.25 \cdot {x}^{2} - 2\right)}} \]
    7. Step-by-step derivation
      1. sub-neg100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(0.25 \cdot {x}^{2} + \left(-2\right)\right)}} \]
      2. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{{x}^{2} \cdot 0.25} + \left(-2\right)\right)} \]
      3. unpow2100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{\left(x \cdot x\right)} \cdot 0.25 + \left(-2\right)\right)} \]
      4. associate-*l*100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{x \cdot \left(x \cdot 0.25\right)} + \left(-2\right)\right)} \]
      5. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(x \cdot \color{blue}{\left(0.25 \cdot x\right)} + \left(-2\right)\right)} \]
      6. fma-def100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\mathsf{fma}\left(x, 0.25 \cdot x, -2\right)}} \]
      7. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \mathsf{fma}\left(x, \color{blue}{x \cdot 0.25}, -2\right)} \]
      8. metadata-eval100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \mathsf{fma}\left(x, x \cdot 0.25, \color{blue}{-2}\right)} \]
    8. Simplified100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\mathsf{fma}\left(x, x \cdot 0.25, -2\right)}} \]
    9. Step-by-step derivation
      1. fma-udef100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(x \cdot \left(x \cdot 0.25\right) + -2\right)}} \]
      2. distribute-rgt-in100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\color{blue}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + -2 \cdot 0.375}} \]
      3. metadata-eval100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + \color{blue}{-0.75}} \]
    10. Applied egg-rr100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\color{blue}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + -0.75}} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification99.5%

    \[\leadsto \begin{array}{l} \mathbf{if}\;x \leq -0.01 \lor \neg \left(x \leq 0.0001\right):\\ \;\;\;\;2.6666666666666665 \cdot \frac{{\sin \left(x \cdot 0.5\right)}^{2}}{\sin x}\\ \mathbf{else}:\\ \;\;\;\;\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\ \end{array} \]

Alternative 3: 99.5% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \sin \left(x \cdot -0.5\right)\\ \mathbf{if}\;x \leq -0.01 \lor \neg \left(x \leq 0.0001\right):\\ \;\;\;\;{t_0}^{2} \cdot \frac{2.6666666666666665}{\sin x}\\ \mathbf{else}:\\ \;\;\;\;\frac{t_0}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\ \end{array} \end{array} \]
(FPCore (x)
 :precision binary64
 (let* ((t_0 (sin (* x -0.5))))
   (if (or (<= x -0.01) (not (<= x 0.0001)))
     (* (pow t_0 2.0) (/ 2.6666666666666665 (sin x)))
     (/ t_0 (+ (* 0.375 (* x (* x 0.25))) -0.75)))))
double code(double x) {
	double t_0 = sin((x * -0.5));
	double tmp;
	if ((x <= -0.01) || !(x <= 0.0001)) {
		tmp = pow(t_0, 2.0) * (2.6666666666666665 / sin(x));
	} else {
		tmp = t_0 / ((0.375 * (x * (x * 0.25))) + -0.75);
	}
	return tmp;
}
real(8) function code(x)
    real(8), intent (in) :: x
    real(8) :: t_0
    real(8) :: tmp
    t_0 = sin((x * (-0.5d0)))
    if ((x <= (-0.01d0)) .or. (.not. (x <= 0.0001d0))) then
        tmp = (t_0 ** 2.0d0) * (2.6666666666666665d0 / sin(x))
    else
        tmp = t_0 / ((0.375d0 * (x * (x * 0.25d0))) + (-0.75d0))
    end if
    code = tmp
end function
public static double code(double x) {
	double t_0 = Math.sin((x * -0.5));
	double tmp;
	if ((x <= -0.01) || !(x <= 0.0001)) {
		tmp = Math.pow(t_0, 2.0) * (2.6666666666666665 / Math.sin(x));
	} else {
		tmp = t_0 / ((0.375 * (x * (x * 0.25))) + -0.75);
	}
	return tmp;
}
def code(x):
	t_0 = math.sin((x * -0.5))
	tmp = 0
	if (x <= -0.01) or not (x <= 0.0001):
		tmp = math.pow(t_0, 2.0) * (2.6666666666666665 / math.sin(x))
	else:
		tmp = t_0 / ((0.375 * (x * (x * 0.25))) + -0.75)
	return tmp
function code(x)
	t_0 = sin(Float64(x * -0.5))
	tmp = 0.0
	if ((x <= -0.01) || !(x <= 0.0001))
		tmp = Float64((t_0 ^ 2.0) * Float64(2.6666666666666665 / sin(x)));
	else
		tmp = Float64(t_0 / Float64(Float64(0.375 * Float64(x * Float64(x * 0.25))) + -0.75));
	end
	return tmp
end
function tmp_2 = code(x)
	t_0 = sin((x * -0.5));
	tmp = 0.0;
	if ((x <= -0.01) || ~((x <= 0.0001)))
		tmp = (t_0 ^ 2.0) * (2.6666666666666665 / sin(x));
	else
		tmp = t_0 / ((0.375 * (x * (x * 0.25))) + -0.75);
	end
	tmp_2 = tmp;
end
code[x_] := Block[{t$95$0 = N[Sin[N[(x * -0.5), $MachinePrecision]], $MachinePrecision]}, If[Or[LessEqual[x, -0.01], N[Not[LessEqual[x, 0.0001]], $MachinePrecision]], N[(N[Power[t$95$0, 2.0], $MachinePrecision] * N[(2.6666666666666665 / N[Sin[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(t$95$0 / N[(N[(0.375 * N[(x * N[(x * 0.25), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + -0.75), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}

\\
\begin{array}{l}
t_0 := \sin \left(x \cdot -0.5\right)\\
\mathbf{if}\;x \leq -0.01 \lor \neg \left(x \leq 0.0001\right):\\
\;\;\;\;{t_0}^{2} \cdot \frac{2.6666666666666665}{\sin x}\\

\mathbf{else}:\\
\;\;\;\;\frac{t_0}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if x < -0.0100000000000000002 or 1.00000000000000005e-4 < x

    1. Initial program 99.0%

      \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
    2. Step-by-step derivation
      1. associate-/l*99.0%

        \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      2. associate-*r/98.9%

        \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      3. metadata-eval98.9%

        \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
      4. associate-/l*98.9%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
      5. sqr-neg98.9%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      6. sin-neg98.9%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      7. distribute-lft-neg-out98.9%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      8. sin-neg98.9%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
      9. distribute-lft-neg-out98.9%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
      10. associate-*r/99.0%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
      11. distribute-lft-neg-out99.0%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      12. distribute-rgt-neg-in99.0%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      13. metadata-eval99.0%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      14. distribute-lft-neg-out99.0%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
      15. distribute-rgt-neg-in99.0%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
      16. metadata-eval99.0%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
    3. Simplified99.0%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
    4. Step-by-step derivation
      1. associate-*r/98.9%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)}{\sin x}} \]
      2. associate-*r/99.0%

        \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)\right)}{\sin x}} \]
      3. sqr-sin-a98.1%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(0.5 - 0.5 \cdot \cos \left(2 \cdot \left(x \cdot -0.5\right)\right)\right)}}{\sin x} \]
      4. add-sqr-sqrt32.3%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot -0.5} \cdot \sqrt{x \cdot -0.5}\right)}\right)\right)}{\sin x} \]
      5. sqrt-unprod51.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\sqrt{\left(x \cdot -0.5\right) \cdot \left(x \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      6. swap-sqr51.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot x\right) \cdot \left(-0.5 \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      7. metadata-eval51.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{0.25}}\right)\right)}{\sin x} \]
      8. metadata-eval51.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{\left(0.5 \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      9. swap-sqr51.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot 0.5\right) \cdot \left(x \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      10. sqrt-unprod31.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot 0.5} \cdot \sqrt{x \cdot 0.5}\right)}\right)\right)}{\sin x} \]
      11. add-sqr-sqrt98.1%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(x \cdot 0.5\right)}\right)\right)}{\sin x} \]
      12. sqr-sin-a99.0%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      13. associate-*l*99.0%

        \[\leadsto \frac{\color{blue}{\left(2.6666666666666665 \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}}{\sin x} \]
    5. Applied egg-rr99.2%

      \[\leadsto \color{blue}{\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \frac{\sin x}{\sin \left(x \cdot -0.5\right)}}} \]
    6. Taylor expanded in x around inf 98.9%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \frac{{\sin \left(-0.5 \cdot x\right)}^{2}}{\sin x}} \]
    7. Step-by-step derivation
      1. associate-*r/99.0%

        \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot {\sin \left(-0.5 \cdot x\right)}^{2}}{\sin x}} \]
      2. *-commutative99.0%

        \[\leadsto \frac{2.6666666666666665 \cdot {\sin \color{blue}{\left(x \cdot -0.5\right)}}^{2}}{\sin x} \]
      3. associate-*l/99.0%

        \[\leadsto \color{blue}{\frac{2.6666666666666665}{\sin x} \cdot {\sin \left(x \cdot -0.5\right)}^{2}} \]
      4. *-commutative99.0%

        \[\leadsto \color{blue}{{\sin \left(x \cdot -0.5\right)}^{2} \cdot \frac{2.6666666666666665}{\sin x}} \]
    8. Simplified99.0%

      \[\leadsto \color{blue}{{\sin \left(x \cdot -0.5\right)}^{2} \cdot \frac{2.6666666666666665}{\sin x}} \]

    if -0.0100000000000000002 < x < 1.00000000000000005e-4

    1. Initial program 59.2%

      \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
    2. Step-by-step derivation
      1. associate-/l*99.5%

        \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      2. associate-*r/99.5%

        \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      3. metadata-eval99.5%

        \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
      4. associate-/l*59.2%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
      5. sqr-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      6. sin-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      7. distribute-lft-neg-out59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      8. sin-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
      9. distribute-lft-neg-out59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
      10. associate-*r/99.5%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
      11. distribute-lft-neg-out99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      12. distribute-rgt-neg-in99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      13. metadata-eval99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      14. distribute-lft-neg-out99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
      15. distribute-rgt-neg-in99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
      16. metadata-eval99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
    3. Simplified99.5%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
    4. Step-by-step derivation
      1. associate-*r/59.2%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)}{\sin x}} \]
      2. associate-*r/59.1%

        \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)\right)}{\sin x}} \]
      3. sqr-sin-a5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(0.5 - 0.5 \cdot \cos \left(2 \cdot \left(x \cdot -0.5\right)\right)\right)}}{\sin x} \]
      4. add-sqr-sqrt2.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot -0.5} \cdot \sqrt{x \cdot -0.5}\right)}\right)\right)}{\sin x} \]
      5. sqrt-unprod5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\sqrt{\left(x \cdot -0.5\right) \cdot \left(x \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      6. swap-sqr5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot x\right) \cdot \left(-0.5 \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      7. metadata-eval5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{0.25}}\right)\right)}{\sin x} \]
      8. metadata-eval5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{\left(0.5 \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      9. swap-sqr5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot 0.5\right) \cdot \left(x \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      10. sqrt-unprod2.9%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot 0.5} \cdot \sqrt{x \cdot 0.5}\right)}\right)\right)}{\sin x} \]
      11. add-sqr-sqrt5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(x \cdot 0.5\right)}\right)\right)}{\sin x} \]
      12. sqr-sin-a59.1%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      13. associate-*l*59.2%

        \[\leadsto \frac{\color{blue}{\left(2.6666666666666665 \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}}{\sin x} \]
    5. Applied egg-rr100.0%

      \[\leadsto \color{blue}{\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \frac{\sin x}{\sin \left(x \cdot -0.5\right)}}} \]
    6. Taylor expanded in x around 0 100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(0.25 \cdot {x}^{2} - 2\right)}} \]
    7. Step-by-step derivation
      1. sub-neg100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(0.25 \cdot {x}^{2} + \left(-2\right)\right)}} \]
      2. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{{x}^{2} \cdot 0.25} + \left(-2\right)\right)} \]
      3. unpow2100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{\left(x \cdot x\right)} \cdot 0.25 + \left(-2\right)\right)} \]
      4. associate-*l*100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{x \cdot \left(x \cdot 0.25\right)} + \left(-2\right)\right)} \]
      5. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(x \cdot \color{blue}{\left(0.25 \cdot x\right)} + \left(-2\right)\right)} \]
      6. fma-def100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\mathsf{fma}\left(x, 0.25 \cdot x, -2\right)}} \]
      7. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \mathsf{fma}\left(x, \color{blue}{x \cdot 0.25}, -2\right)} \]
      8. metadata-eval100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \mathsf{fma}\left(x, x \cdot 0.25, \color{blue}{-2}\right)} \]
    8. Simplified100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\mathsf{fma}\left(x, x \cdot 0.25, -2\right)}} \]
    9. Step-by-step derivation
      1. fma-udef100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(x \cdot \left(x \cdot 0.25\right) + -2\right)}} \]
      2. distribute-rgt-in100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\color{blue}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + -2 \cdot 0.375}} \]
      3. metadata-eval100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + \color{blue}{-0.75}} \]
    10. Applied egg-rr100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\color{blue}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + -0.75}} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification99.6%

    \[\leadsto \begin{array}{l} \mathbf{if}\;x \leq -0.01 \lor \neg \left(x \leq 0.0001\right):\\ \;\;\;\;{\sin \left(x \cdot -0.5\right)}^{2} \cdot \frac{2.6666666666666665}{\sin x}\\ \mathbf{else}:\\ \;\;\;\;\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\ \end{array} \]

Alternative 4: 99.5% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \sin \left(x \cdot -0.5\right)\\ t_1 := {t_0}^{2}\\ \mathbf{if}\;x \leq -0.01:\\ \;\;\;\;t_1 \cdot \frac{2.6666666666666665}{\sin x}\\ \mathbf{elif}\;x \leq 0.0001:\\ \;\;\;\;\frac{t_0}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\ \mathbf{else}:\\ \;\;\;\;\frac{2.6666666666666665 \cdot t_1}{\sin x}\\ \end{array} \end{array} \]
(FPCore (x)
 :precision binary64
 (let* ((t_0 (sin (* x -0.5))) (t_1 (pow t_0 2.0)))
   (if (<= x -0.01)
     (* t_1 (/ 2.6666666666666665 (sin x)))
     (if (<= x 0.0001)
       (/ t_0 (+ (* 0.375 (* x (* x 0.25))) -0.75))
       (/ (* 2.6666666666666665 t_1) (sin x))))))
double code(double x) {
	double t_0 = sin((x * -0.5));
	double t_1 = pow(t_0, 2.0);
	double tmp;
	if (x <= -0.01) {
		tmp = t_1 * (2.6666666666666665 / sin(x));
	} else if (x <= 0.0001) {
		tmp = t_0 / ((0.375 * (x * (x * 0.25))) + -0.75);
	} else {
		tmp = (2.6666666666666665 * t_1) / sin(x);
	}
	return tmp;
}
real(8) function code(x)
    real(8), intent (in) :: x
    real(8) :: t_0
    real(8) :: t_1
    real(8) :: tmp
    t_0 = sin((x * (-0.5d0)))
    t_1 = t_0 ** 2.0d0
    if (x <= (-0.01d0)) then
        tmp = t_1 * (2.6666666666666665d0 / sin(x))
    else if (x <= 0.0001d0) then
        tmp = t_0 / ((0.375d0 * (x * (x * 0.25d0))) + (-0.75d0))
    else
        tmp = (2.6666666666666665d0 * t_1) / sin(x)
    end if
    code = tmp
end function
public static double code(double x) {
	double t_0 = Math.sin((x * -0.5));
	double t_1 = Math.pow(t_0, 2.0);
	double tmp;
	if (x <= -0.01) {
		tmp = t_1 * (2.6666666666666665 / Math.sin(x));
	} else if (x <= 0.0001) {
		tmp = t_0 / ((0.375 * (x * (x * 0.25))) + -0.75);
	} else {
		tmp = (2.6666666666666665 * t_1) / Math.sin(x);
	}
	return tmp;
}
def code(x):
	t_0 = math.sin((x * -0.5))
	t_1 = math.pow(t_0, 2.0)
	tmp = 0
	if x <= -0.01:
		tmp = t_1 * (2.6666666666666665 / math.sin(x))
	elif x <= 0.0001:
		tmp = t_0 / ((0.375 * (x * (x * 0.25))) + -0.75)
	else:
		tmp = (2.6666666666666665 * t_1) / math.sin(x)
	return tmp
function code(x)
	t_0 = sin(Float64(x * -0.5))
	t_1 = t_0 ^ 2.0
	tmp = 0.0
	if (x <= -0.01)
		tmp = Float64(t_1 * Float64(2.6666666666666665 / sin(x)));
	elseif (x <= 0.0001)
		tmp = Float64(t_0 / Float64(Float64(0.375 * Float64(x * Float64(x * 0.25))) + -0.75));
	else
		tmp = Float64(Float64(2.6666666666666665 * t_1) / sin(x));
	end
	return tmp
end
function tmp_2 = code(x)
	t_0 = sin((x * -0.5));
	t_1 = t_0 ^ 2.0;
	tmp = 0.0;
	if (x <= -0.01)
		tmp = t_1 * (2.6666666666666665 / sin(x));
	elseif (x <= 0.0001)
		tmp = t_0 / ((0.375 * (x * (x * 0.25))) + -0.75);
	else
		tmp = (2.6666666666666665 * t_1) / sin(x);
	end
	tmp_2 = tmp;
end
code[x_] := Block[{t$95$0 = N[Sin[N[(x * -0.5), $MachinePrecision]], $MachinePrecision]}, Block[{t$95$1 = N[Power[t$95$0, 2.0], $MachinePrecision]}, If[LessEqual[x, -0.01], N[(t$95$1 * N[(2.6666666666666665 / N[Sin[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision], If[LessEqual[x, 0.0001], N[(t$95$0 / N[(N[(0.375 * N[(x * N[(x * 0.25), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + -0.75), $MachinePrecision]), $MachinePrecision], N[(N[(2.6666666666666665 * t$95$1), $MachinePrecision] / N[Sin[x], $MachinePrecision]), $MachinePrecision]]]]]
\begin{array}{l}

\\
\begin{array}{l}
t_0 := \sin \left(x \cdot -0.5\right)\\
t_1 := {t_0}^{2}\\
\mathbf{if}\;x \leq -0.01:\\
\;\;\;\;t_1 \cdot \frac{2.6666666666666665}{\sin x}\\

\mathbf{elif}\;x \leq 0.0001:\\
\;\;\;\;\frac{t_0}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\

\mathbf{else}:\\
\;\;\;\;\frac{2.6666666666666665 \cdot t_1}{\sin x}\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if x < -0.0100000000000000002

    1. Initial program 99.0%

      \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
    2. Step-by-step derivation
      1. associate-/l*99.0%

        \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      2. associate-*r/99.1%

        \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      3. metadata-eval99.1%

        \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
      4. associate-/l*99.0%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
      5. sqr-neg99.0%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      6. sin-neg99.0%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      7. distribute-lft-neg-out99.0%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      8. sin-neg99.0%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
      9. distribute-lft-neg-out99.0%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
      10. associate-*r/99.1%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
      11. distribute-lft-neg-out99.1%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      12. distribute-rgt-neg-in99.1%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      13. metadata-eval99.1%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      14. distribute-lft-neg-out99.1%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
      15. distribute-rgt-neg-in99.1%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
      16. metadata-eval99.1%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
    3. Simplified99.1%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
    4. Step-by-step derivation
      1. associate-*r/99.0%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)}{\sin x}} \]
      2. associate-*r/99.1%

        \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)\right)}{\sin x}} \]
      3. sqr-sin-a98.4%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(0.5 - 0.5 \cdot \cos \left(2 \cdot \left(x \cdot -0.5\right)\right)\right)}}{\sin x} \]
      4. add-sqr-sqrt61.9%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot -0.5} \cdot \sqrt{x \cdot -0.5}\right)}\right)\right)}{\sin x} \]
      5. sqrt-unprod45.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\sqrt{\left(x \cdot -0.5\right) \cdot \left(x \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      6. swap-sqr45.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot x\right) \cdot \left(-0.5 \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      7. metadata-eval45.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{0.25}}\right)\right)}{\sin x} \]
      8. metadata-eval45.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{\left(0.5 \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      9. swap-sqr45.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot 0.5\right) \cdot \left(x \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      10. sqrt-unprod0.0%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot 0.5} \cdot \sqrt{x \cdot 0.5}\right)}\right)\right)}{\sin x} \]
      11. add-sqr-sqrt98.4%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(x \cdot 0.5\right)}\right)\right)}{\sin x} \]
      12. sqr-sin-a99.1%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      13. associate-*l*99.0%

        \[\leadsto \frac{\color{blue}{\left(2.6666666666666665 \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}}{\sin x} \]
    5. Applied egg-rr99.2%

      \[\leadsto \color{blue}{\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \frac{\sin x}{\sin \left(x \cdot -0.5\right)}}} \]
    6. Taylor expanded in x around inf 99.0%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \frac{{\sin \left(-0.5 \cdot x\right)}^{2}}{\sin x}} \]
    7. Step-by-step derivation
      1. associate-*r/99.1%

        \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot {\sin \left(-0.5 \cdot x\right)}^{2}}{\sin x}} \]
      2. *-commutative99.1%

        \[\leadsto \frac{2.6666666666666665 \cdot {\sin \color{blue}{\left(x \cdot -0.5\right)}}^{2}}{\sin x} \]
      3. associate-*l/99.2%

        \[\leadsto \color{blue}{\frac{2.6666666666666665}{\sin x} \cdot {\sin \left(x \cdot -0.5\right)}^{2}} \]
      4. *-commutative99.2%

        \[\leadsto \color{blue}{{\sin \left(x \cdot -0.5\right)}^{2} \cdot \frac{2.6666666666666665}{\sin x}} \]
    8. Simplified99.2%

      \[\leadsto \color{blue}{{\sin \left(x \cdot -0.5\right)}^{2} \cdot \frac{2.6666666666666665}{\sin x}} \]

    if -0.0100000000000000002 < x < 1.00000000000000005e-4

    1. Initial program 59.2%

      \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
    2. Step-by-step derivation
      1. associate-/l*99.5%

        \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      2. associate-*r/99.5%

        \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      3. metadata-eval99.5%

        \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
      4. associate-/l*59.2%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
      5. sqr-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      6. sin-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      7. distribute-lft-neg-out59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      8. sin-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
      9. distribute-lft-neg-out59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
      10. associate-*r/99.5%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
      11. distribute-lft-neg-out99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      12. distribute-rgt-neg-in99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      13. metadata-eval99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      14. distribute-lft-neg-out99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
      15. distribute-rgt-neg-in99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
      16. metadata-eval99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
    3. Simplified99.5%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
    4. Step-by-step derivation
      1. associate-*r/59.2%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)}{\sin x}} \]
      2. associate-*r/59.1%

        \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)\right)}{\sin x}} \]
      3. sqr-sin-a5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(0.5 - 0.5 \cdot \cos \left(2 \cdot \left(x \cdot -0.5\right)\right)\right)}}{\sin x} \]
      4. add-sqr-sqrt2.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot -0.5} \cdot \sqrt{x \cdot -0.5}\right)}\right)\right)}{\sin x} \]
      5. sqrt-unprod5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\sqrt{\left(x \cdot -0.5\right) \cdot \left(x \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      6. swap-sqr5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot x\right) \cdot \left(-0.5 \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      7. metadata-eval5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{0.25}}\right)\right)}{\sin x} \]
      8. metadata-eval5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{\left(0.5 \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      9. swap-sqr5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot 0.5\right) \cdot \left(x \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      10. sqrt-unprod2.9%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot 0.5} \cdot \sqrt{x \cdot 0.5}\right)}\right)\right)}{\sin x} \]
      11. add-sqr-sqrt5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(x \cdot 0.5\right)}\right)\right)}{\sin x} \]
      12. sqr-sin-a59.1%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      13. associate-*l*59.2%

        \[\leadsto \frac{\color{blue}{\left(2.6666666666666665 \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}}{\sin x} \]
    5. Applied egg-rr100.0%

      \[\leadsto \color{blue}{\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \frac{\sin x}{\sin \left(x \cdot -0.5\right)}}} \]
    6. Taylor expanded in x around 0 100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(0.25 \cdot {x}^{2} - 2\right)}} \]
    7. Step-by-step derivation
      1. sub-neg100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(0.25 \cdot {x}^{2} + \left(-2\right)\right)}} \]
      2. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{{x}^{2} \cdot 0.25} + \left(-2\right)\right)} \]
      3. unpow2100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{\left(x \cdot x\right)} \cdot 0.25 + \left(-2\right)\right)} \]
      4. associate-*l*100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{x \cdot \left(x \cdot 0.25\right)} + \left(-2\right)\right)} \]
      5. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(x \cdot \color{blue}{\left(0.25 \cdot x\right)} + \left(-2\right)\right)} \]
      6. fma-def100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\mathsf{fma}\left(x, 0.25 \cdot x, -2\right)}} \]
      7. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \mathsf{fma}\left(x, \color{blue}{x \cdot 0.25}, -2\right)} \]
      8. metadata-eval100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \mathsf{fma}\left(x, x \cdot 0.25, \color{blue}{-2}\right)} \]
    8. Simplified100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\mathsf{fma}\left(x, x \cdot 0.25, -2\right)}} \]
    9. Step-by-step derivation
      1. fma-udef100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(x \cdot \left(x \cdot 0.25\right) + -2\right)}} \]
      2. distribute-rgt-in100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\color{blue}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + -2 \cdot 0.375}} \]
      3. metadata-eval100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + \color{blue}{-0.75}} \]
    10. Applied egg-rr100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\color{blue}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + -0.75}} \]

    if 1.00000000000000005e-4 < x

    1. Initial program 98.9%

      \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
    2. Step-by-step derivation
      1. associate-/l*98.9%

        \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      2. associate-*r/98.8%

        \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      3. metadata-eval98.8%

        \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
      4. associate-/l*98.8%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
      5. sqr-neg98.8%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      6. sin-neg98.8%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      7. distribute-lft-neg-out98.8%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      8. sin-neg98.8%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
      9. distribute-lft-neg-out98.8%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
      10. associate-*r/98.9%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
      11. distribute-lft-neg-out98.9%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      12. distribute-rgt-neg-in98.9%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      13. metadata-eval98.9%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      14. distribute-lft-neg-out98.9%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
      15. distribute-rgt-neg-in98.9%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
      16. metadata-eval98.9%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
    3. Simplified98.9%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
    4. Step-by-step derivation
      1. associate-*r/98.8%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)}{\sin x}} \]
      2. associate-*r/98.9%

        \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)\right)}{\sin x}} \]
      3. pow298.9%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{{\sin \left(x \cdot -0.5\right)}^{2}}}{\sin x} \]
    5. Applied egg-rr98.9%

      \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot {\sin \left(x \cdot -0.5\right)}^{2}}{\sin x}} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification99.6%

    \[\leadsto \begin{array}{l} \mathbf{if}\;x \leq -0.01:\\ \;\;\;\;{\sin \left(x \cdot -0.5\right)}^{2} \cdot \frac{2.6666666666666665}{\sin x}\\ \mathbf{elif}\;x \leq 0.0001:\\ \;\;\;\;\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\ \mathbf{else}:\\ \;\;\;\;\frac{2.6666666666666665 \cdot {\sin \left(x \cdot -0.5\right)}^{2}}{\sin x}\\ \end{array} \]

Alternative 5: 99.5% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \sin \left(x \cdot -0.5\right)\\ t_1 := {t_0}^{2}\\ \mathbf{if}\;x \leq -0.01:\\ \;\;\;\;t_1 \cdot \frac{2.6666666666666665}{\sin x}\\ \mathbf{elif}\;x \leq 5 \cdot 10^{-7}:\\ \;\;\;\;\frac{t_0}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\ \mathbf{else}:\\ \;\;\;\;\frac{t_1}{0.375 \cdot \sin x}\\ \end{array} \end{array} \]
(FPCore (x)
 :precision binary64
 (let* ((t_0 (sin (* x -0.5))) (t_1 (pow t_0 2.0)))
   (if (<= x -0.01)
     (* t_1 (/ 2.6666666666666665 (sin x)))
     (if (<= x 5e-7)
       (/ t_0 (+ (* 0.375 (* x (* x 0.25))) -0.75))
       (/ t_1 (* 0.375 (sin x)))))))
double code(double x) {
	double t_0 = sin((x * -0.5));
	double t_1 = pow(t_0, 2.0);
	double tmp;
	if (x <= -0.01) {
		tmp = t_1 * (2.6666666666666665 / sin(x));
	} else if (x <= 5e-7) {
		tmp = t_0 / ((0.375 * (x * (x * 0.25))) + -0.75);
	} else {
		tmp = t_1 / (0.375 * sin(x));
	}
	return tmp;
}
real(8) function code(x)
    real(8), intent (in) :: x
    real(8) :: t_0
    real(8) :: t_1
    real(8) :: tmp
    t_0 = sin((x * (-0.5d0)))
    t_1 = t_0 ** 2.0d0
    if (x <= (-0.01d0)) then
        tmp = t_1 * (2.6666666666666665d0 / sin(x))
    else if (x <= 5d-7) then
        tmp = t_0 / ((0.375d0 * (x * (x * 0.25d0))) + (-0.75d0))
    else
        tmp = t_1 / (0.375d0 * sin(x))
    end if
    code = tmp
end function
public static double code(double x) {
	double t_0 = Math.sin((x * -0.5));
	double t_1 = Math.pow(t_0, 2.0);
	double tmp;
	if (x <= -0.01) {
		tmp = t_1 * (2.6666666666666665 / Math.sin(x));
	} else if (x <= 5e-7) {
		tmp = t_0 / ((0.375 * (x * (x * 0.25))) + -0.75);
	} else {
		tmp = t_1 / (0.375 * Math.sin(x));
	}
	return tmp;
}
def code(x):
	t_0 = math.sin((x * -0.5))
	t_1 = math.pow(t_0, 2.0)
	tmp = 0
	if x <= -0.01:
		tmp = t_1 * (2.6666666666666665 / math.sin(x))
	elif x <= 5e-7:
		tmp = t_0 / ((0.375 * (x * (x * 0.25))) + -0.75)
	else:
		tmp = t_1 / (0.375 * math.sin(x))
	return tmp
function code(x)
	t_0 = sin(Float64(x * -0.5))
	t_1 = t_0 ^ 2.0
	tmp = 0.0
	if (x <= -0.01)
		tmp = Float64(t_1 * Float64(2.6666666666666665 / sin(x)));
	elseif (x <= 5e-7)
		tmp = Float64(t_0 / Float64(Float64(0.375 * Float64(x * Float64(x * 0.25))) + -0.75));
	else
		tmp = Float64(t_1 / Float64(0.375 * sin(x)));
	end
	return tmp
end
function tmp_2 = code(x)
	t_0 = sin((x * -0.5));
	t_1 = t_0 ^ 2.0;
	tmp = 0.0;
	if (x <= -0.01)
		tmp = t_1 * (2.6666666666666665 / sin(x));
	elseif (x <= 5e-7)
		tmp = t_0 / ((0.375 * (x * (x * 0.25))) + -0.75);
	else
		tmp = t_1 / (0.375 * sin(x));
	end
	tmp_2 = tmp;
end
code[x_] := Block[{t$95$0 = N[Sin[N[(x * -0.5), $MachinePrecision]], $MachinePrecision]}, Block[{t$95$1 = N[Power[t$95$0, 2.0], $MachinePrecision]}, If[LessEqual[x, -0.01], N[(t$95$1 * N[(2.6666666666666665 / N[Sin[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision], If[LessEqual[x, 5e-7], N[(t$95$0 / N[(N[(0.375 * N[(x * N[(x * 0.25), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + -0.75), $MachinePrecision]), $MachinePrecision], N[(t$95$1 / N[(0.375 * N[Sin[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]]]
\begin{array}{l}

\\
\begin{array}{l}
t_0 := \sin \left(x \cdot -0.5\right)\\
t_1 := {t_0}^{2}\\
\mathbf{if}\;x \leq -0.01:\\
\;\;\;\;t_1 \cdot \frac{2.6666666666666665}{\sin x}\\

\mathbf{elif}\;x \leq 5 \cdot 10^{-7}:\\
\;\;\;\;\frac{t_0}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\

\mathbf{else}:\\
\;\;\;\;\frac{t_1}{0.375 \cdot \sin x}\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if x < -0.0100000000000000002

    1. Initial program 99.0%

      \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
    2. Step-by-step derivation
      1. associate-/l*99.0%

        \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      2. associate-*r/99.1%

        \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      3. metadata-eval99.1%

        \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
      4. associate-/l*99.0%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
      5. sqr-neg99.0%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      6. sin-neg99.0%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      7. distribute-lft-neg-out99.0%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      8. sin-neg99.0%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
      9. distribute-lft-neg-out99.0%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
      10. associate-*r/99.1%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
      11. distribute-lft-neg-out99.1%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      12. distribute-rgt-neg-in99.1%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      13. metadata-eval99.1%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      14. distribute-lft-neg-out99.1%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
      15. distribute-rgt-neg-in99.1%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
      16. metadata-eval99.1%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
    3. Simplified99.1%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
    4. Step-by-step derivation
      1. associate-*r/99.0%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)}{\sin x}} \]
      2. associate-*r/99.1%

        \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)\right)}{\sin x}} \]
      3. sqr-sin-a98.4%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(0.5 - 0.5 \cdot \cos \left(2 \cdot \left(x \cdot -0.5\right)\right)\right)}}{\sin x} \]
      4. add-sqr-sqrt61.9%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot -0.5} \cdot \sqrt{x \cdot -0.5}\right)}\right)\right)}{\sin x} \]
      5. sqrt-unprod45.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\sqrt{\left(x \cdot -0.5\right) \cdot \left(x \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      6. swap-sqr45.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot x\right) \cdot \left(-0.5 \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      7. metadata-eval45.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{0.25}}\right)\right)}{\sin x} \]
      8. metadata-eval45.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{\left(0.5 \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      9. swap-sqr45.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot 0.5\right) \cdot \left(x \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      10. sqrt-unprod0.0%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot 0.5} \cdot \sqrt{x \cdot 0.5}\right)}\right)\right)}{\sin x} \]
      11. add-sqr-sqrt98.4%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(x \cdot 0.5\right)}\right)\right)}{\sin x} \]
      12. sqr-sin-a99.1%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      13. associate-*l*99.0%

        \[\leadsto \frac{\color{blue}{\left(2.6666666666666665 \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}}{\sin x} \]
    5. Applied egg-rr99.2%

      \[\leadsto \color{blue}{\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \frac{\sin x}{\sin \left(x \cdot -0.5\right)}}} \]
    6. Taylor expanded in x around inf 99.0%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \frac{{\sin \left(-0.5 \cdot x\right)}^{2}}{\sin x}} \]
    7. Step-by-step derivation
      1. associate-*r/99.1%

        \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot {\sin \left(-0.5 \cdot x\right)}^{2}}{\sin x}} \]
      2. *-commutative99.1%

        \[\leadsto \frac{2.6666666666666665 \cdot {\sin \color{blue}{\left(x \cdot -0.5\right)}}^{2}}{\sin x} \]
      3. associate-*l/99.2%

        \[\leadsto \color{blue}{\frac{2.6666666666666665}{\sin x} \cdot {\sin \left(x \cdot -0.5\right)}^{2}} \]
      4. *-commutative99.2%

        \[\leadsto \color{blue}{{\sin \left(x \cdot -0.5\right)}^{2} \cdot \frac{2.6666666666666665}{\sin x}} \]
    8. Simplified99.2%

      \[\leadsto \color{blue}{{\sin \left(x \cdot -0.5\right)}^{2} \cdot \frac{2.6666666666666665}{\sin x}} \]

    if -0.0100000000000000002 < x < 4.99999999999999977e-7

    1. Initial program 59.2%

      \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
    2. Step-by-step derivation
      1. associate-/l*99.5%

        \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      2. associate-*r/99.5%

        \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      3. metadata-eval99.5%

        \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
      4. associate-/l*59.2%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
      5. sqr-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      6. sin-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      7. distribute-lft-neg-out59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      8. sin-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
      9. distribute-lft-neg-out59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
      10. associate-*r/99.5%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
      11. distribute-lft-neg-out99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      12. distribute-rgt-neg-in99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      13. metadata-eval99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      14. distribute-lft-neg-out99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
      15. distribute-rgt-neg-in99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
      16. metadata-eval99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
    3. Simplified99.5%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
    4. Step-by-step derivation
      1. associate-*r/59.2%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)}{\sin x}} \]
      2. associate-*r/59.1%

        \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)\right)}{\sin x}} \]
      3. sqr-sin-a5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(0.5 - 0.5 \cdot \cos \left(2 \cdot \left(x \cdot -0.5\right)\right)\right)}}{\sin x} \]
      4. add-sqr-sqrt2.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot -0.5} \cdot \sqrt{x \cdot -0.5}\right)}\right)\right)}{\sin x} \]
      5. sqrt-unprod5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\sqrt{\left(x \cdot -0.5\right) \cdot \left(x \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      6. swap-sqr5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot x\right) \cdot \left(-0.5 \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      7. metadata-eval5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{0.25}}\right)\right)}{\sin x} \]
      8. metadata-eval5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{\left(0.5 \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      9. swap-sqr5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot 0.5\right) \cdot \left(x \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      10. sqrt-unprod2.9%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot 0.5} \cdot \sqrt{x \cdot 0.5}\right)}\right)\right)}{\sin x} \]
      11. add-sqr-sqrt5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(x \cdot 0.5\right)}\right)\right)}{\sin x} \]
      12. sqr-sin-a59.1%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      13. associate-*l*59.2%

        \[\leadsto \frac{\color{blue}{\left(2.6666666666666665 \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}}{\sin x} \]
    5. Applied egg-rr100.0%

      \[\leadsto \color{blue}{\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \frac{\sin x}{\sin \left(x \cdot -0.5\right)}}} \]
    6. Taylor expanded in x around 0 100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(0.25 \cdot {x}^{2} - 2\right)}} \]
    7. Step-by-step derivation
      1. sub-neg100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(0.25 \cdot {x}^{2} + \left(-2\right)\right)}} \]
      2. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{{x}^{2} \cdot 0.25} + \left(-2\right)\right)} \]
      3. unpow2100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{\left(x \cdot x\right)} \cdot 0.25 + \left(-2\right)\right)} \]
      4. associate-*l*100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{x \cdot \left(x \cdot 0.25\right)} + \left(-2\right)\right)} \]
      5. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(x \cdot \color{blue}{\left(0.25 \cdot x\right)} + \left(-2\right)\right)} \]
      6. fma-def100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\mathsf{fma}\left(x, 0.25 \cdot x, -2\right)}} \]
      7. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \mathsf{fma}\left(x, \color{blue}{x \cdot 0.25}, -2\right)} \]
      8. metadata-eval100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \mathsf{fma}\left(x, x \cdot 0.25, \color{blue}{-2}\right)} \]
    8. Simplified100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\mathsf{fma}\left(x, x \cdot 0.25, -2\right)}} \]
    9. Step-by-step derivation
      1. fma-udef100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(x \cdot \left(x \cdot 0.25\right) + -2\right)}} \]
      2. distribute-rgt-in100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\color{blue}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + -2 \cdot 0.375}} \]
      3. metadata-eval100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + \color{blue}{-0.75}} \]
    10. Applied egg-rr100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\color{blue}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + -0.75}} \]

    if 4.99999999999999977e-7 < x

    1. Initial program 98.9%

      \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
    2. Step-by-step derivation
      1. associate-/l*98.9%

        \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      2. associate-*r/98.8%

        \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      3. metadata-eval98.8%

        \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
      4. associate-/l*98.8%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
      5. sqr-neg98.8%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      6. sin-neg98.8%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      7. distribute-lft-neg-out98.8%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      8. sin-neg98.8%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
      9. distribute-lft-neg-out98.8%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
      10. associate-*r/98.9%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
      11. distribute-lft-neg-out98.9%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      12. distribute-rgt-neg-in98.9%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      13. metadata-eval98.9%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      14. distribute-lft-neg-out98.9%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
      15. distribute-rgt-neg-in98.9%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
      16. metadata-eval98.9%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
    3. Simplified98.9%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
    4. Applied egg-rr99.1%

      \[\leadsto \color{blue}{\frac{{\sin \left(x \cdot -0.5\right)}^{2}}{\sin x \cdot 0.375}} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification99.6%

    \[\leadsto \begin{array}{l} \mathbf{if}\;x \leq -0.01:\\ \;\;\;\;{\sin \left(x \cdot -0.5\right)}^{2} \cdot \frac{2.6666666666666665}{\sin x}\\ \mathbf{elif}\;x \leq 5 \cdot 10^{-7}:\\ \;\;\;\;\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\ \mathbf{else}:\\ \;\;\;\;\frac{{\sin \left(x \cdot -0.5\right)}^{2}}{0.375 \cdot \sin x}\\ \end{array} \]

Alternative 6: 99.2% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \sin \left(x \cdot -0.5\right)\\ 2.6666666666666665 \cdot \left(t_0 \cdot \frac{t_0}{\sin x}\right) \end{array} \end{array} \]
(FPCore (x)
 :precision binary64
 (let* ((t_0 (sin (* x -0.5))))
   (* 2.6666666666666665 (* t_0 (/ t_0 (sin x))))))
double code(double x) {
	double t_0 = sin((x * -0.5));
	return 2.6666666666666665 * (t_0 * (t_0 / sin(x)));
}
real(8) function code(x)
    real(8), intent (in) :: x
    real(8) :: t_0
    t_0 = sin((x * (-0.5d0)))
    code = 2.6666666666666665d0 * (t_0 * (t_0 / sin(x)))
end function
public static double code(double x) {
	double t_0 = Math.sin((x * -0.5));
	return 2.6666666666666665 * (t_0 * (t_0 / Math.sin(x)));
}
def code(x):
	t_0 = math.sin((x * -0.5))
	return 2.6666666666666665 * (t_0 * (t_0 / math.sin(x)))
function code(x)
	t_0 = sin(Float64(x * -0.5))
	return Float64(2.6666666666666665 * Float64(t_0 * Float64(t_0 / sin(x))))
end
function tmp = code(x)
	t_0 = sin((x * -0.5));
	tmp = 2.6666666666666665 * (t_0 * (t_0 / sin(x)));
end
code[x_] := Block[{t$95$0 = N[Sin[N[(x * -0.5), $MachinePrecision]], $MachinePrecision]}, N[(2.6666666666666665 * N[(t$95$0 * N[(t$95$0 / N[Sin[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
t_0 := \sin \left(x \cdot -0.5\right)\\
2.6666666666666665 \cdot \left(t_0 \cdot \frac{t_0}{\sin x}\right)
\end{array}
\end{array}
Derivation
  1. Initial program 77.7%

    \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
  2. Step-by-step derivation
    1. associate-/l*99.2%

      \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
    2. associate-*r/99.2%

      \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
    3. metadata-eval99.2%

      \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
    4. associate-/l*77.7%

      \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
    5. sqr-neg77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
    6. sin-neg77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
    7. distribute-lft-neg-out77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
    8. sin-neg77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
    9. distribute-lft-neg-out77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
    10. associate-*r/99.3%

      \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
    11. distribute-lft-neg-out99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
    12. distribute-rgt-neg-in99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
    13. metadata-eval99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
    14. distribute-lft-neg-out99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
    15. distribute-rgt-neg-in99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
    16. metadata-eval99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
  3. Simplified99.3%

    \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
  4. Final simplification99.3%

    \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right) \]

Alternative 7: 99.2% accurate, 1.5× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;x \leq -0.0054 \lor \neg \left(x \leq 0.005\right):\\ \;\;\;\;\frac{2.6666666666666665}{\sin x} \cdot \left(0.5 - \frac{\cos x}{2}\right)\\ \mathbf{else}:\\ \;\;\;\;\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\ \end{array} \end{array} \]
(FPCore (x)
 :precision binary64
 (if (or (<= x -0.0054) (not (<= x 0.005)))
   (* (/ 2.6666666666666665 (sin x)) (- 0.5 (/ (cos x) 2.0)))
   (/ (sin (* x -0.5)) (+ (* 0.375 (* x (* x 0.25))) -0.75))))
double code(double x) {
	double tmp;
	if ((x <= -0.0054) || !(x <= 0.005)) {
		tmp = (2.6666666666666665 / sin(x)) * (0.5 - (cos(x) / 2.0));
	} else {
		tmp = sin((x * -0.5)) / ((0.375 * (x * (x * 0.25))) + -0.75);
	}
	return tmp;
}
real(8) function code(x)
    real(8), intent (in) :: x
    real(8) :: tmp
    if ((x <= (-0.0054d0)) .or. (.not. (x <= 0.005d0))) then
        tmp = (2.6666666666666665d0 / sin(x)) * (0.5d0 - (cos(x) / 2.0d0))
    else
        tmp = sin((x * (-0.5d0))) / ((0.375d0 * (x * (x * 0.25d0))) + (-0.75d0))
    end if
    code = tmp
end function
public static double code(double x) {
	double tmp;
	if ((x <= -0.0054) || !(x <= 0.005)) {
		tmp = (2.6666666666666665 / Math.sin(x)) * (0.5 - (Math.cos(x) / 2.0));
	} else {
		tmp = Math.sin((x * -0.5)) / ((0.375 * (x * (x * 0.25))) + -0.75);
	}
	return tmp;
}
def code(x):
	tmp = 0
	if (x <= -0.0054) or not (x <= 0.005):
		tmp = (2.6666666666666665 / math.sin(x)) * (0.5 - (math.cos(x) / 2.0))
	else:
		tmp = math.sin((x * -0.5)) / ((0.375 * (x * (x * 0.25))) + -0.75)
	return tmp
function code(x)
	tmp = 0.0
	if ((x <= -0.0054) || !(x <= 0.005))
		tmp = Float64(Float64(2.6666666666666665 / sin(x)) * Float64(0.5 - Float64(cos(x) / 2.0)));
	else
		tmp = Float64(sin(Float64(x * -0.5)) / Float64(Float64(0.375 * Float64(x * Float64(x * 0.25))) + -0.75));
	end
	return tmp
end
function tmp_2 = code(x)
	tmp = 0.0;
	if ((x <= -0.0054) || ~((x <= 0.005)))
		tmp = (2.6666666666666665 / sin(x)) * (0.5 - (cos(x) / 2.0));
	else
		tmp = sin((x * -0.5)) / ((0.375 * (x * (x * 0.25))) + -0.75);
	end
	tmp_2 = tmp;
end
code[x_] := If[Or[LessEqual[x, -0.0054], N[Not[LessEqual[x, 0.005]], $MachinePrecision]], N[(N[(2.6666666666666665 / N[Sin[x], $MachinePrecision]), $MachinePrecision] * N[(0.5 - N[(N[Cos[x], $MachinePrecision] / 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[Sin[N[(x * -0.5), $MachinePrecision]], $MachinePrecision] / N[(N[(0.375 * N[(x * N[(x * 0.25), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + -0.75), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;x \leq -0.0054 \lor \neg \left(x \leq 0.005\right):\\
\;\;\;\;\frac{2.6666666666666665}{\sin x} \cdot \left(0.5 - \frac{\cos x}{2}\right)\\

\mathbf{else}:\\
\;\;\;\;\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if x < -0.0054000000000000003 or 0.0050000000000000001 < x

    1. Initial program 99.0%

      \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
    2. Step-by-step derivation
      1. associate-/l*99.0%

        \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      2. associate-*r/98.9%

        \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      3. metadata-eval98.9%

        \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
      4. associate-/l*98.9%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
      5. sqr-neg98.9%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      6. sin-neg98.9%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      7. distribute-lft-neg-out98.9%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      8. sin-neg98.9%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
      9. distribute-lft-neg-out98.9%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
      10. associate-*r/99.0%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
      11. distribute-lft-neg-out99.0%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      12. distribute-rgt-neg-in99.0%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      13. metadata-eval99.0%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      14. distribute-lft-neg-out99.0%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
      15. distribute-rgt-neg-in99.0%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
      16. metadata-eval99.0%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
    3. Simplified99.0%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
    4. Step-by-step derivation
      1. associate-*r/98.9%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)}{\sin x}} \]
      2. associate-*r/99.0%

        \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)\right)}{\sin x}} \]
      3. sqr-sin-a98.1%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(0.5 - 0.5 \cdot \cos \left(2 \cdot \left(x \cdot -0.5\right)\right)\right)}}{\sin x} \]
      4. add-sqr-sqrt32.3%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot -0.5} \cdot \sqrt{x \cdot -0.5}\right)}\right)\right)}{\sin x} \]
      5. sqrt-unprod51.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\sqrt{\left(x \cdot -0.5\right) \cdot \left(x \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      6. swap-sqr51.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot x\right) \cdot \left(-0.5 \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      7. metadata-eval51.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{0.25}}\right)\right)}{\sin x} \]
      8. metadata-eval51.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{\left(0.5 \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      9. swap-sqr51.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot 0.5\right) \cdot \left(x \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      10. sqrt-unprod31.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot 0.5} \cdot \sqrt{x \cdot 0.5}\right)}\right)\right)}{\sin x} \]
      11. add-sqr-sqrt98.1%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(x \cdot 0.5\right)}\right)\right)}{\sin x} \]
      12. sqr-sin-a99.0%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      13. associate-*l*99.0%

        \[\leadsto \frac{\color{blue}{\left(2.6666666666666665 \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}}{\sin x} \]
    5. Applied egg-rr99.2%

      \[\leadsto \color{blue}{\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \frac{\sin x}{\sin \left(x \cdot -0.5\right)}}} \]
    6. Taylor expanded in x around inf 98.9%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \frac{{\sin \left(-0.5 \cdot x\right)}^{2}}{\sin x}} \]
    7. Step-by-step derivation
      1. associate-*r/99.0%

        \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot {\sin \left(-0.5 \cdot x\right)}^{2}}{\sin x}} \]
      2. *-commutative99.0%

        \[\leadsto \frac{2.6666666666666665 \cdot {\sin \color{blue}{\left(x \cdot -0.5\right)}}^{2}}{\sin x} \]
      3. associate-*l/99.0%

        \[\leadsto \color{blue}{\frac{2.6666666666666665}{\sin x} \cdot {\sin \left(x \cdot -0.5\right)}^{2}} \]
      4. *-commutative99.0%

        \[\leadsto \color{blue}{{\sin \left(x \cdot -0.5\right)}^{2} \cdot \frac{2.6666666666666665}{\sin x}} \]
    8. Simplified99.0%

      \[\leadsto \color{blue}{{\sin \left(x \cdot -0.5\right)}^{2} \cdot \frac{2.6666666666666665}{\sin x}} \]
    9. Step-by-step derivation
      1. unpow299.0%

        \[\leadsto \color{blue}{\left(\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)\right)} \cdot \frac{2.6666666666666665}{\sin x} \]
      2. sin-mult98.1%

        \[\leadsto \color{blue}{\frac{\cos \left(x \cdot -0.5 - x \cdot -0.5\right) - \cos \left(x \cdot -0.5 + x \cdot -0.5\right)}{2}} \cdot \frac{2.6666666666666665}{\sin x} \]
    10. Applied egg-rr98.1%

      \[\leadsto \color{blue}{\frac{\cos \left(x \cdot -0.5 - x \cdot -0.5\right) - \cos \left(x \cdot -0.5 + x \cdot -0.5\right)}{2}} \cdot \frac{2.6666666666666665}{\sin x} \]
    11. Step-by-step derivation
      1. div-sub98.1%

        \[\leadsto \color{blue}{\left(\frac{\cos \left(x \cdot -0.5 - x \cdot -0.5\right)}{2} - \frac{\cos \left(x \cdot -0.5 + x \cdot -0.5\right)}{2}\right)} \cdot \frac{2.6666666666666665}{\sin x} \]
      2. +-inverses98.1%

        \[\leadsto \left(\frac{\cos \color{blue}{0}}{2} - \frac{\cos \left(x \cdot -0.5 + x \cdot -0.5\right)}{2}\right) \cdot \frac{2.6666666666666665}{\sin x} \]
      3. cos-098.1%

        \[\leadsto \left(\frac{\color{blue}{1}}{2} - \frac{\cos \left(x \cdot -0.5 + x \cdot -0.5\right)}{2}\right) \cdot \frac{2.6666666666666665}{\sin x} \]
      4. metadata-eval98.1%

        \[\leadsto \left(\color{blue}{0.5} - \frac{\cos \left(x \cdot -0.5 + x \cdot -0.5\right)}{2}\right) \cdot \frac{2.6666666666666665}{\sin x} \]
      5. distribute-lft-out98.1%

        \[\leadsto \left(0.5 - \frac{\cos \color{blue}{\left(x \cdot \left(-0.5 + -0.5\right)\right)}}{2}\right) \cdot \frac{2.6666666666666665}{\sin x} \]
      6. metadata-eval98.1%

        \[\leadsto \left(0.5 - \frac{\cos \left(x \cdot \color{blue}{-1}\right)}{2}\right) \cdot \frac{2.6666666666666665}{\sin x} \]
      7. *-commutative98.1%

        \[\leadsto \left(0.5 - \frac{\cos \color{blue}{\left(-1 \cdot x\right)}}{2}\right) \cdot \frac{2.6666666666666665}{\sin x} \]
      8. neg-mul-198.1%

        \[\leadsto \left(0.5 - \frac{\cos \color{blue}{\left(-x\right)}}{2}\right) \cdot \frac{2.6666666666666665}{\sin x} \]
      9. cos-neg98.1%

        \[\leadsto \left(0.5 - \frac{\color{blue}{\cos x}}{2}\right) \cdot \frac{2.6666666666666665}{\sin x} \]
    12. Simplified98.1%

      \[\leadsto \color{blue}{\left(0.5 - \frac{\cos x}{2}\right)} \cdot \frac{2.6666666666666665}{\sin x} \]

    if -0.0054000000000000003 < x < 0.0050000000000000001

    1. Initial program 59.2%

      \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
    2. Step-by-step derivation
      1. associate-/l*99.5%

        \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      2. associate-*r/99.5%

        \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
      3. metadata-eval99.5%

        \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
      4. associate-/l*59.2%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
      5. sqr-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      6. sin-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      7. distribute-lft-neg-out59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
      8. sin-neg59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
      9. distribute-lft-neg-out59.2%

        \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
      10. associate-*r/99.5%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
      11. distribute-lft-neg-out99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      12. distribute-rgt-neg-in99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      13. metadata-eval99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
      14. distribute-lft-neg-out99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
      15. distribute-rgt-neg-in99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
      16. metadata-eval99.5%

        \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
    3. Simplified99.5%

      \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
    4. Step-by-step derivation
      1. associate-*r/59.2%

        \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)}{\sin x}} \]
      2. associate-*r/59.1%

        \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)\right)}{\sin x}} \]
      3. sqr-sin-a5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(0.5 - 0.5 \cdot \cos \left(2 \cdot \left(x \cdot -0.5\right)\right)\right)}}{\sin x} \]
      4. add-sqr-sqrt2.8%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot -0.5} \cdot \sqrt{x \cdot -0.5}\right)}\right)\right)}{\sin x} \]
      5. sqrt-unprod5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\sqrt{\left(x \cdot -0.5\right) \cdot \left(x \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      6. swap-sqr5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot x\right) \cdot \left(-0.5 \cdot -0.5\right)}}\right)\right)}{\sin x} \]
      7. metadata-eval5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{0.25}}\right)\right)}{\sin x} \]
      8. metadata-eval5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{\left(0.5 \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      9. swap-sqr5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot 0.5\right) \cdot \left(x \cdot 0.5\right)}}\right)\right)}{\sin x} \]
      10. sqrt-unprod2.9%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot 0.5} \cdot \sqrt{x \cdot 0.5}\right)}\right)\right)}{\sin x} \]
      11. add-sqr-sqrt5.7%

        \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(x \cdot 0.5\right)}\right)\right)}{\sin x} \]
      12. sqr-sin-a59.1%

        \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
      13. associate-*l*59.2%

        \[\leadsto \frac{\color{blue}{\left(2.6666666666666665 \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}}{\sin x} \]
    5. Applied egg-rr100.0%

      \[\leadsto \color{blue}{\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \frac{\sin x}{\sin \left(x \cdot -0.5\right)}}} \]
    6. Taylor expanded in x around 0 100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(0.25 \cdot {x}^{2} - 2\right)}} \]
    7. Step-by-step derivation
      1. sub-neg100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(0.25 \cdot {x}^{2} + \left(-2\right)\right)}} \]
      2. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{{x}^{2} \cdot 0.25} + \left(-2\right)\right)} \]
      3. unpow2100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{\left(x \cdot x\right)} \cdot 0.25 + \left(-2\right)\right)} \]
      4. associate-*l*100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(\color{blue}{x \cdot \left(x \cdot 0.25\right)} + \left(-2\right)\right)} \]
      5. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(x \cdot \color{blue}{\left(0.25 \cdot x\right)} + \left(-2\right)\right)} \]
      6. fma-def100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\mathsf{fma}\left(x, 0.25 \cdot x, -2\right)}} \]
      7. *-commutative100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \mathsf{fma}\left(x, \color{blue}{x \cdot 0.25}, -2\right)} \]
      8. metadata-eval100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \mathsf{fma}\left(x, x \cdot 0.25, \color{blue}{-2}\right)} \]
    8. Simplified100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\mathsf{fma}\left(x, x \cdot 0.25, -2\right)}} \]
    9. Step-by-step derivation
      1. fma-udef100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \color{blue}{\left(x \cdot \left(x \cdot 0.25\right) + -2\right)}} \]
      2. distribute-rgt-in100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\color{blue}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + -2 \cdot 0.375}} \]
      3. metadata-eval100.0%

        \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + \color{blue}{-0.75}} \]
    10. Applied egg-rr100.0%

      \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\color{blue}{\left(x \cdot \left(x \cdot 0.25\right)\right) \cdot 0.375 + -0.75}} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification99.1%

    \[\leadsto \begin{array}{l} \mathbf{if}\;x \leq -0.0054 \lor \neg \left(x \leq 0.005\right):\\ \;\;\;\;\frac{2.6666666666666665}{\sin x} \cdot \left(0.5 - \frac{\cos x}{2}\right)\\ \mathbf{else}:\\ \;\;\;\;\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \left(x \cdot \left(x \cdot 0.25\right)\right) + -0.75}\\ \end{array} \]

Alternative 8: 54.0% accurate, 3.0× speedup?

\[\begin{array}{l} \\ \sin \left(x \cdot 0.5\right) \cdot 1.3333333333333333 \end{array} \]
(FPCore (x) :precision binary64 (* (sin (* x 0.5)) 1.3333333333333333))
double code(double x) {
	return sin((x * 0.5)) * 1.3333333333333333;
}
real(8) function code(x)
    real(8), intent (in) :: x
    code = sin((x * 0.5d0)) * 1.3333333333333333d0
end function
public static double code(double x) {
	return Math.sin((x * 0.5)) * 1.3333333333333333;
}
def code(x):
	return math.sin((x * 0.5)) * 1.3333333333333333
function code(x)
	return Float64(sin(Float64(x * 0.5)) * 1.3333333333333333)
end
function tmp = code(x)
	tmp = sin((x * 0.5)) * 1.3333333333333333;
end
code[x_] := N[(N[Sin[N[(x * 0.5), $MachinePrecision]], $MachinePrecision] * 1.3333333333333333), $MachinePrecision]
\begin{array}{l}

\\
\sin \left(x \cdot 0.5\right) \cdot 1.3333333333333333
\end{array}
Derivation
  1. Initial program 77.7%

    \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
  2. Simplified99.1%

    \[\leadsto \color{blue}{\sin \left(x \cdot 0.5\right) \cdot \left(\sin \left(x \cdot 0.5\right) \cdot \frac{2.6666666666666665}{\sin x}\right)} \]
  3. Taylor expanded in x around 0 58.6%

    \[\leadsto \sin \left(x \cdot 0.5\right) \cdot \color{blue}{1.3333333333333333} \]
  4. Final simplification58.6%

    \[\leadsto \sin \left(x \cdot 0.5\right) \cdot 1.3333333333333333 \]

Alternative 9: 54.2% accurate, 3.0× speedup?

\[\begin{array}{l} \\ \frac{\sin \left(x \cdot -0.5\right)}{-0.75} \end{array} \]
(FPCore (x) :precision binary64 (/ (sin (* x -0.5)) -0.75))
double code(double x) {
	return sin((x * -0.5)) / -0.75;
}
real(8) function code(x)
    real(8), intent (in) :: x
    code = sin((x * (-0.5d0))) / (-0.75d0)
end function
public static double code(double x) {
	return Math.sin((x * -0.5)) / -0.75;
}
def code(x):
	return math.sin((x * -0.5)) / -0.75
function code(x)
	return Float64(sin(Float64(x * -0.5)) / -0.75)
end
function tmp = code(x)
	tmp = sin((x * -0.5)) / -0.75;
end
code[x_] := N[(N[Sin[N[(x * -0.5), $MachinePrecision]], $MachinePrecision] / -0.75), $MachinePrecision]
\begin{array}{l}

\\
\frac{\sin \left(x \cdot -0.5\right)}{-0.75}
\end{array}
Derivation
  1. Initial program 77.7%

    \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
  2. Step-by-step derivation
    1. associate-/l*99.2%

      \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
    2. associate-*r/99.2%

      \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
    3. metadata-eval99.2%

      \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
    4. associate-/l*77.7%

      \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
    5. sqr-neg77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
    6. sin-neg77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
    7. distribute-lft-neg-out77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
    8. sin-neg77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
    9. distribute-lft-neg-out77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
    10. associate-*r/99.3%

      \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
    11. distribute-lft-neg-out99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
    12. distribute-rgt-neg-in99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
    13. metadata-eval99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
    14. distribute-lft-neg-out99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
    15. distribute-rgt-neg-in99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
    16. metadata-eval99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
  3. Simplified99.3%

    \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
  4. Step-by-step derivation
    1. associate-*r/77.7%

      \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)}{\sin x}} \]
    2. associate-*r/77.7%

      \[\leadsto \color{blue}{\frac{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \sin \left(x \cdot -0.5\right)\right)}{\sin x}} \]
    3. sqr-sin-a48.7%

      \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(0.5 - 0.5 \cdot \cos \left(2 \cdot \left(x \cdot -0.5\right)\right)\right)}}{\sin x} \]
    4. add-sqr-sqrt16.5%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot -0.5} \cdot \sqrt{x \cdot -0.5}\right)}\right)\right)}{\sin x} \]
    5. sqrt-unprod27.1%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\sqrt{\left(x \cdot -0.5\right) \cdot \left(x \cdot -0.5\right)}}\right)\right)}{\sin x} \]
    6. swap-sqr27.1%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot x\right) \cdot \left(-0.5 \cdot -0.5\right)}}\right)\right)}{\sin x} \]
    7. metadata-eval27.1%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{0.25}}\right)\right)}{\sin x} \]
    8. metadata-eval27.1%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\left(x \cdot x\right) \cdot \color{blue}{\left(0.5 \cdot 0.5\right)}}\right)\right)}{\sin x} \]
    9. swap-sqr27.1%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \sqrt{\color{blue}{\left(x \cdot 0.5\right) \cdot \left(x \cdot 0.5\right)}}\right)\right)}{\sin x} \]
    10. sqrt-unprod16.3%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(\sqrt{x \cdot 0.5} \cdot \sqrt{x \cdot 0.5}\right)}\right)\right)}{\sin x} \]
    11. add-sqr-sqrt48.7%

      \[\leadsto \frac{2.6666666666666665 \cdot \left(0.5 - 0.5 \cdot \cos \left(2 \cdot \color{blue}{\left(x \cdot 0.5\right)}\right)\right)}{\sin x} \]
    12. sqr-sin-a77.7%

      \[\leadsto \frac{2.6666666666666665 \cdot \color{blue}{\left(\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
    13. associate-*l*77.7%

      \[\leadsto \frac{\color{blue}{\left(2.6666666666666665 \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}}{\sin x} \]
  5. Applied egg-rr99.6%

    \[\leadsto \color{blue}{\frac{\sin \left(x \cdot -0.5\right)}{0.375 \cdot \frac{\sin x}{\sin \left(x \cdot -0.5\right)}}} \]
  6. Taylor expanded in x around 0 58.9%

    \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{\color{blue}{-0.75}} \]
  7. Final simplification58.9%

    \[\leadsto \frac{\sin \left(x \cdot -0.5\right)}{-0.75} \]

Alternative 10: 49.8% accurate, 104.3× speedup?

\[\begin{array}{l} \\ x \cdot 0.6666666666666666 \end{array} \]
(FPCore (x) :precision binary64 (* x 0.6666666666666666))
double code(double x) {
	return x * 0.6666666666666666;
}
real(8) function code(x)
    real(8), intent (in) :: x
    code = x * 0.6666666666666666d0
end function
public static double code(double x) {
	return x * 0.6666666666666666;
}
def code(x):
	return x * 0.6666666666666666
function code(x)
	return Float64(x * 0.6666666666666666)
end
function tmp = code(x)
	tmp = x * 0.6666666666666666;
end
code[x_] := N[(x * 0.6666666666666666), $MachinePrecision]
\begin{array}{l}

\\
x \cdot 0.6666666666666666
\end{array}
Derivation
  1. Initial program 77.7%

    \[\frac{\left(\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x} \]
  2. Step-by-step derivation
    1. associate-/l*99.2%

      \[\leadsto \color{blue}{\frac{\frac{8}{3} \cdot \sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
    2. associate-*r/99.2%

      \[\leadsto \color{blue}{\frac{8}{3} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}}} \]
    3. metadata-eval99.2%

      \[\leadsto \color{blue}{2.6666666666666665} \cdot \frac{\sin \left(x \cdot 0.5\right)}{\frac{\sin x}{\sin \left(x \cdot 0.5\right)}} \]
    4. associate-/l*77.7%

      \[\leadsto 2.6666666666666665 \cdot \color{blue}{\frac{\sin \left(x \cdot 0.5\right) \cdot \sin \left(x \cdot 0.5\right)}{\sin x}} \]
    5. sqr-neg77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\left(-\sin \left(x \cdot 0.5\right)\right) \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}}{\sin x} \]
    6. sin-neg77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\color{blue}{\sin \left(-x \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
    7. distribute-lft-neg-out77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)} \cdot \left(-\sin \left(x \cdot 0.5\right)\right)}{\sin x} \]
    8. sin-neg77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \color{blue}{\sin \left(-x \cdot 0.5\right)}}{\sin x} \]
    9. distribute-lft-neg-out77.7%

      \[\leadsto 2.6666666666666665 \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \sin \color{blue}{\left(\left(-x\right) \cdot 0.5\right)}}{\sin x} \]
    10. associate-*r/99.3%

      \[\leadsto 2.6666666666666665 \cdot \color{blue}{\left(\sin \left(\left(-x\right) \cdot 0.5\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right)} \]
    11. distribute-lft-neg-out99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(-x \cdot 0.5\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
    12. distribute-rgt-neg-in99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)} \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
    13. metadata-eval99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot \color{blue}{-0.5}\right) \cdot \frac{\sin \left(\left(-x\right) \cdot 0.5\right)}{\sin x}\right) \]
    14. distribute-lft-neg-out99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(-x \cdot 0.5\right)}}{\sin x}\right) \]
    15. distribute-rgt-neg-in99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \color{blue}{\left(x \cdot \left(-0.5\right)\right)}}{\sin x}\right) \]
    16. metadata-eval99.3%

      \[\leadsto 2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot \color{blue}{-0.5}\right)}{\sin x}\right) \]
  3. Simplified99.3%

    \[\leadsto \color{blue}{2.6666666666666665 \cdot \left(\sin \left(x \cdot -0.5\right) \cdot \frac{\sin \left(x \cdot -0.5\right)}{\sin x}\right)} \]
  4. Taylor expanded in x around 0 55.0%

    \[\leadsto \color{blue}{0.6666666666666666 \cdot x} \]
  5. Final simplification55.0%

    \[\leadsto x \cdot 0.6666666666666666 \]

Developer target: 99.5% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \sin \left(x \cdot 0.5\right)\\ \frac{\frac{8 \cdot t_0}{3}}{\frac{\sin x}{t_0}} \end{array} \end{array} \]
(FPCore (x)
 :precision binary64
 (let* ((t_0 (sin (* x 0.5)))) (/ (/ (* 8.0 t_0) 3.0) (/ (sin x) t_0))))
double code(double x) {
	double t_0 = sin((x * 0.5));
	return ((8.0 * t_0) / 3.0) / (sin(x) / t_0);
}
real(8) function code(x)
    real(8), intent (in) :: x
    real(8) :: t_0
    t_0 = sin((x * 0.5d0))
    code = ((8.0d0 * t_0) / 3.0d0) / (sin(x) / t_0)
end function
public static double code(double x) {
	double t_0 = Math.sin((x * 0.5));
	return ((8.0 * t_0) / 3.0) / (Math.sin(x) / t_0);
}
def code(x):
	t_0 = math.sin((x * 0.5))
	return ((8.0 * t_0) / 3.0) / (math.sin(x) / t_0)
function code(x)
	t_0 = sin(Float64(x * 0.5))
	return Float64(Float64(Float64(8.0 * t_0) / 3.0) / Float64(sin(x) / t_0))
end
function tmp = code(x)
	t_0 = sin((x * 0.5));
	tmp = ((8.0 * t_0) / 3.0) / (sin(x) / t_0);
end
code[x_] := Block[{t$95$0 = N[Sin[N[(x * 0.5), $MachinePrecision]], $MachinePrecision]}, N[(N[(N[(8.0 * t$95$0), $MachinePrecision] / 3.0), $MachinePrecision] / N[(N[Sin[x], $MachinePrecision] / t$95$0), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
t_0 := \sin \left(x \cdot 0.5\right)\\
\frac{\frac{8 \cdot t_0}{3}}{\frac{\sin x}{t_0}}
\end{array}
\end{array}

Reproduce

?
herbie shell --seed 2023271 
(FPCore (x)
  :name "Graphics.Rasterific.Svg.PathConverter:segmentToBezier from rasterific-svg-0.2.3.1, A"
  :precision binary64

  :herbie-target
  (/ (/ (* 8.0 (sin (* x 0.5))) 3.0) (/ (sin x) (sin (* x 0.5))))

  (/ (* (* (/ 8.0 3.0) (sin (* x 0.5))) (sin (* x 0.5))) (sin x)))