
(FPCore (a b angle) :precision binary64 (let* ((t_0 (* (PI) (/ angle 180.0)))) (+ (pow (* a (cos t_0)) 2.0) (pow (* b (sin t_0)) 2.0))))
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \mathsf{PI}\left(\right) \cdot \frac{angle}{180}\\
{\left(a \cdot \cos t\_0\right)}^{2} + {\left(b \cdot \sin t\_0\right)}^{2}
\end{array}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 12 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (a b angle) :precision binary64 (let* ((t_0 (* (PI) (/ angle 180.0)))) (+ (pow (* a (cos t_0)) 2.0) (pow (* b (sin t_0)) 2.0))))
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \mathsf{PI}\left(\right) \cdot \frac{angle}{180}\\
{\left(a \cdot \cos t\_0\right)}^{2} + {\left(b \cdot \sin t\_0\right)}^{2}
\end{array}
\end{array}
angle_m = (fabs.f64 angle)
(FPCore (a b angle_m)
:precision binary64
(+
(pow (* a (cos (* (PI) (/ angle_m 180.0)))) 2.0)
(pow
(*
b
(sin
(*
0.005555555555555556
(* (pow angle_m 0.5) (/ (PI) (pow angle_m -0.5))))))
2.0)))\begin{array}{l}
angle_m = \left|angle\right|
\\
{\left(a \cdot \cos \left(\mathsf{PI}\left(\right) \cdot \frac{angle\_m}{180}\right)\right)}^{2} + {\left(b \cdot \sin \left(0.005555555555555556 \cdot \left({angle\_m}^{0.5} \cdot \frac{\mathsf{PI}\left(\right)}{{angle\_m}^{-0.5}}\right)\right)\right)}^{2}
\end{array}
Initial program 76.1%
lift-*.f64N/A
lift-/.f64N/A
clear-numN/A
associate-*r/N/A
*-commutativeN/A
div-invN/A
times-fracN/A
lower-*.f64N/A
metadata-evalN/A
lower-/.f64N/A
inv-powN/A
lower-pow.f6476.1
Applied rewrites76.1%
lift-/.f64N/A
*-lft-identityN/A
lift-pow.f64N/A
sqr-powN/A
times-fracN/A
lower-*.f64N/A
pow-flipN/A
metadata-evalN/A
metadata-evalN/A
lower-pow.f64N/A
lower-/.f64N/A
lower-pow.f64N/A
metadata-eval34.2
Applied rewrites34.2%
angle_m = (fabs.f64 angle)
(FPCore (a b angle_m)
:precision binary64
(+
(pow (* a (cos (* (PI) (/ angle_m 180.0)))) 2.0)
(pow
(*
b
(sin
(*
0.005555555555555556
(pow (/ (pow angle_m -0.5) (* (PI) (sqrt angle_m))) -1.0))))
2.0)))\begin{array}{l}
angle_m = \left|angle\right|
\\
{\left(a \cdot \cos \left(\mathsf{PI}\left(\right) \cdot \frac{angle\_m}{180}\right)\right)}^{2} + {\left(b \cdot \sin \left(0.005555555555555556 \cdot {\left(\frac{{angle\_m}^{-0.5}}{\mathsf{PI}\left(\right) \cdot \sqrt{angle\_m}}\right)}^{-1}\right)\right)}^{2}
\end{array}
Initial program 76.1%
lift-*.f64N/A
lift-/.f64N/A
clear-numN/A
associate-*r/N/A
*-commutativeN/A
div-invN/A
times-fracN/A
lower-*.f64N/A
metadata-evalN/A
lower-/.f64N/A
inv-powN/A
lower-pow.f6476.1
Applied rewrites76.1%
lift-/.f64N/A
*-lft-identityN/A
lift-pow.f64N/A
sqr-powN/A
times-fracN/A
lower-*.f64N/A
pow-flipN/A
metadata-evalN/A
metadata-evalN/A
lower-pow.f64N/A
lower-/.f64N/A
lower-pow.f64N/A
metadata-eval34.2
Applied rewrites34.2%
lift-*.f64N/A
lift-/.f64N/A
associate-*r/N/A
clear-numN/A
lower-/.f64N/A
lift-pow.f64N/A
metadata-evalN/A
pow-flipN/A
lift-pow.f64N/A
associate-/r/N/A
clear-numN/A
lift-/.f64N/A
lower-/.f6434.1
lift-/.f64N/A
div-invN/A
lift-pow.f64N/A
pow-flipN/A
metadata-evalN/A
lift-pow.f64N/A
lower-*.f6434.2
lift-pow.f64N/A
unpow1/2N/A
lower-sqrt.f6434.2
Applied rewrites34.2%
Final simplification34.2%
angle_m = (fabs.f64 angle) (FPCore (a b angle_m) :precision binary64 (let* ((t_0 (* (* 0.005555555555555556 angle_m) (PI)))) (fma (* (pow (cos t_0) 2.0) a) a (pow (* (sin t_0) b) 2.0))))
\begin{array}{l}
angle_m = \left|angle\right|
\\
\begin{array}{l}
t_0 := \left(0.005555555555555556 \cdot angle\_m\right) \cdot \mathsf{PI}\left(\right)\\
\mathsf{fma}\left({\cos t\_0}^{2} \cdot a, a, {\left(\sin t\_0 \cdot b\right)}^{2}\right)
\end{array}
\end{array}
Initial program 76.1%
lift-*.f64N/A
lift-/.f64N/A
clear-numN/A
associate-*r/N/A
*-commutativeN/A
div-invN/A
times-fracN/A
lower-*.f64N/A
metadata-evalN/A
lower-/.f64N/A
inv-powN/A
lower-pow.f6476.1
Applied rewrites76.1%
lift-/.f64N/A
*-lft-identityN/A
lift-pow.f64N/A
sqr-powN/A
times-fracN/A
lower-*.f64N/A
pow-flipN/A
metadata-evalN/A
metadata-evalN/A
lower-pow.f64N/A
lower-/.f64N/A
lower-pow.f64N/A
metadata-eval34.2
Applied rewrites34.2%
Applied rewrites76.2%
angle_m = (fabs.f64 angle) (FPCore (a b angle_m) :precision binary64 (+ (pow (* a (cos (* (* angle_m -0.005555555555555556) (PI)))) 2.0) (pow (* b (sin (* (* angle_m 0.005555555555555556) (PI)))) 2.0)))
\begin{array}{l}
angle_m = \left|angle\right|
\\
{\left(a \cdot \cos \left(\left(angle\_m \cdot -0.005555555555555556\right) \cdot \mathsf{PI}\left(\right)\right)\right)}^{2} + {\left(b \cdot \sin \left(\left(angle\_m \cdot 0.005555555555555556\right) \cdot \mathsf{PI}\left(\right)\right)\right)}^{2}
\end{array}
Initial program 76.1%
lift-cos.f64N/A
lift-*.f64N/A
*-commutativeN/A
lift-/.f64N/A
frac-2negN/A
distribute-frac-negN/A
distribute-lft-neg-outN/A
cos-negN/A
lower-cos.f64N/A
lower-*.f64N/A
div-invN/A
lower-*.f64N/A
metadata-evalN/A
metadata-eval76.1
Applied rewrites76.1%
lift-*.f64N/A
*-commutativeN/A
lower-*.f6476.1
lift-/.f64N/A
div-invN/A
metadata-evalN/A
lower-*.f6476.2
Applied rewrites76.2%
angle_m = (fabs.f64 angle) (FPCore (a b angle_m) :precision binary64 (+ (pow (* a 1.0) 2.0) (pow (* b (sin (* (PI) (/ angle_m 180.0)))) 2.0)))
\begin{array}{l}
angle_m = \left|angle\right|
\\
{\left(a \cdot 1\right)}^{2} + {\left(b \cdot \sin \left(\mathsf{PI}\left(\right) \cdot \frac{angle\_m}{180}\right)\right)}^{2}
\end{array}
Initial program 76.1%
Taylor expanded in angle around 0
Applied rewrites76.0%
angle_m = (fabs.f64 angle)
(FPCore (a b angle_m)
:precision binary64
(if (<= b 5.5e-112)
(* (pow (cos (* -0.005555555555555556 (* (PI) angle_m))) 2.0) (* a a))
(fma
(* (* (* (* (* (PI) (PI)) b) 3.08641975308642e-5) angle_m) angle_m)
b
(pow (* (cos (* -0.005555555555555556 (* angle_m (PI)))) a) 2.0))))\begin{array}{l}
angle_m = \left|angle\right|
\\
\begin{array}{l}
\mathbf{if}\;b \leq 5.5 \cdot 10^{-112}:\\
\;\;\;\;{\cos \left(-0.005555555555555556 \cdot \left(\mathsf{PI}\left(\right) \cdot angle\_m\right)\right)}^{2} \cdot \left(a \cdot a\right)\\
\mathbf{else}:\\
\;\;\;\;\mathsf{fma}\left(\left(\left(\left(\left(\mathsf{PI}\left(\right) \cdot \mathsf{PI}\left(\right)\right) \cdot b\right) \cdot 3.08641975308642 \cdot 10^{-5}\right) \cdot angle\_m\right) \cdot angle\_m, b, {\left(\cos \left(-0.005555555555555556 \cdot \left(angle\_m \cdot \mathsf{PI}\left(\right)\right)\right) \cdot a\right)}^{2}\right)\\
\end{array}
\end{array}
if b < 5.5e-112Initial program 74.4%
rem-exp-logN/A
unpow1N/A
log-powN/A
lift-pow.f64N/A
log-powN/A
*-commutativeN/A
exp-prodN/A
lower-pow.f64N/A
exp-1-eN/A
lower-E.f64N/A
*-commutativeN/A
log-powN/A
lift-pow.f64N/A
lower-log.f6472.4
Applied rewrites72.4%
Taylor expanded in b around 0
log-EN/A
unpow1N/A
*-commutativeN/A
rem-exp-logN/A
*-rgt-identityN/A
log-EN/A
lower-*.f64N/A
Applied rewrites58.3%
if 5.5e-112 < b Initial program 79.4%
lift-*.f64N/A
*-commutativeN/A
lift-PI.f64N/A
add-sqr-sqrtN/A
associate-*r*N/A
add-cube-cbrtN/A
pow3N/A
sqrt-pow1N/A
metadata-evalN/A
metadata-evalN/A
pow-plusN/A
pow1/2N/A
*-commutativeN/A
associate-*r*N/A
pow1/2N/A
add-sqr-sqrtN/A
cbrt-prodN/A
pow2N/A
pow-powN/A
metadata-evalN/A
unpow1N/A
Applied rewrites79.4%
Applied rewrites74.7%
Taylor expanded in angle around 0
*-commutativeN/A
associate-*r*N/A
unpow2N/A
associate-*r*N/A
lower-*.f64N/A
lower-*.f64N/A
*-commutativeN/A
lower-*.f64N/A
*-commutativeN/A
lower-*.f64N/A
unpow2N/A
lower-*.f64N/A
lower-PI.f64N/A
lower-PI.f6474.7
Applied rewrites74.7%
angle_m = (fabs.f64 angle)
(FPCore (a b angle_m)
:precision binary64
(if (<= b 4.8e-95)
(* (pow (cos (* -0.005555555555555556 (* (PI) angle_m))) 2.0) (* a a))
(if (<= b 8.5e+167)
(fma
(* (* (* (* (PI) (PI)) 3.08641975308642e-5) b) b)
(* angle_m angle_m)
(* a a))
(* (pow (* (* b (PI)) angle_m) 2.0) 3.08641975308642e-5))))\begin{array}{l}
angle_m = \left|angle\right|
\\
\begin{array}{l}
\mathbf{if}\;b \leq 4.8 \cdot 10^{-95}:\\
\;\;\;\;{\cos \left(-0.005555555555555556 \cdot \left(\mathsf{PI}\left(\right) \cdot angle\_m\right)\right)}^{2} \cdot \left(a \cdot a\right)\\
\mathbf{elif}\;b \leq 8.5 \cdot 10^{+167}:\\
\;\;\;\;\mathsf{fma}\left(\left(\left(\left(\mathsf{PI}\left(\right) \cdot \mathsf{PI}\left(\right)\right) \cdot 3.08641975308642 \cdot 10^{-5}\right) \cdot b\right) \cdot b, angle\_m \cdot angle\_m, a \cdot a\right)\\
\mathbf{else}:\\
\;\;\;\;{\left(\left(b \cdot \mathsf{PI}\left(\right)\right) \cdot angle\_m\right)}^{2} \cdot 3.08641975308642 \cdot 10^{-5}\\
\end{array}
\end{array}
if b < 4.8e-95Initial program 74.5%
rem-exp-logN/A
unpow1N/A
log-powN/A
lift-pow.f64N/A
log-powN/A
*-commutativeN/A
exp-prodN/A
lower-pow.f64N/A
exp-1-eN/A
lower-E.f64N/A
*-commutativeN/A
log-powN/A
lift-pow.f64N/A
lower-log.f6472.5
Applied rewrites72.5%
Taylor expanded in b around 0
log-EN/A
unpow1N/A
*-commutativeN/A
rem-exp-logN/A
*-rgt-identityN/A
log-EN/A
lower-*.f64N/A
Applied rewrites58.8%
if 4.8e-95 < b < 8.50000000000000007e167Initial program 71.9%
lift-*.f64N/A
*-commutativeN/A
lift-PI.f64N/A
add-sqr-sqrtN/A
associate-*r*N/A
add-cube-cbrtN/A
pow3N/A
sqrt-pow1N/A
metadata-evalN/A
metadata-evalN/A
pow-plusN/A
pow1/2N/A
*-commutativeN/A
associate-*r*N/A
pow1/2N/A
add-sqr-sqrtN/A
cbrt-prodN/A
pow2N/A
pow-powN/A
metadata-evalN/A
unpow1N/A
Applied rewrites72.0%
Taylor expanded in angle around 0
*-commutativeN/A
lower-fma.f64N/A
Applied rewrites33.4%
Taylor expanded in a around 0
Applied rewrites60.5%
if 8.50000000000000007e167 < b Initial program 99.8%
lift-*.f64N/A
*-commutativeN/A
lift-PI.f64N/A
add-sqr-sqrtN/A
associate-*r*N/A
add-cube-cbrtN/A
pow3N/A
sqrt-pow1N/A
metadata-evalN/A
metadata-evalN/A
pow-plusN/A
pow1/2N/A
*-commutativeN/A
associate-*r*N/A
pow1/2N/A
add-sqr-sqrtN/A
cbrt-prodN/A
pow2N/A
pow-powN/A
metadata-evalN/A
unpow1N/A
Applied rewrites99.8%
Taylor expanded in angle around 0
*-commutativeN/A
lower-fma.f64N/A
Applied rewrites55.0%
Taylor expanded in a around 0
Applied rewrites73.2%
Applied rewrites86.6%
angle_m = (fabs.f64 angle)
(FPCore (a b angle_m)
:precision binary64
(if (<= b 4.8e-95)
(* a a)
(if (<= b 8.5e+167)
(fma
(* (* (* (* (PI) (PI)) 3.08641975308642e-5) b) b)
(* angle_m angle_m)
(* a a))
(* (pow (* (* b (PI)) angle_m) 2.0) 3.08641975308642e-5))))\begin{array}{l}
angle_m = \left|angle\right|
\\
\begin{array}{l}
\mathbf{if}\;b \leq 4.8 \cdot 10^{-95}:\\
\;\;\;\;a \cdot a\\
\mathbf{elif}\;b \leq 8.5 \cdot 10^{+167}:\\
\;\;\;\;\mathsf{fma}\left(\left(\left(\left(\mathsf{PI}\left(\right) \cdot \mathsf{PI}\left(\right)\right) \cdot 3.08641975308642 \cdot 10^{-5}\right) \cdot b\right) \cdot b, angle\_m \cdot angle\_m, a \cdot a\right)\\
\mathbf{else}:\\
\;\;\;\;{\left(\left(b \cdot \mathsf{PI}\left(\right)\right) \cdot angle\_m\right)}^{2} \cdot 3.08641975308642 \cdot 10^{-5}\\
\end{array}
\end{array}
if b < 4.8e-95Initial program 74.5%
Taylor expanded in angle around 0
unpow2N/A
lower-*.f6458.5
Applied rewrites58.5%
if 4.8e-95 < b < 8.50000000000000007e167Initial program 71.9%
lift-*.f64N/A
*-commutativeN/A
lift-PI.f64N/A
add-sqr-sqrtN/A
associate-*r*N/A
add-cube-cbrtN/A
pow3N/A
sqrt-pow1N/A
metadata-evalN/A
metadata-evalN/A
pow-plusN/A
pow1/2N/A
*-commutativeN/A
associate-*r*N/A
pow1/2N/A
add-sqr-sqrtN/A
cbrt-prodN/A
pow2N/A
pow-powN/A
metadata-evalN/A
unpow1N/A
Applied rewrites72.0%
Taylor expanded in angle around 0
*-commutativeN/A
lower-fma.f64N/A
Applied rewrites33.4%
Taylor expanded in a around 0
Applied rewrites60.5%
if 8.50000000000000007e167 < b Initial program 99.8%
lift-*.f64N/A
*-commutativeN/A
lift-PI.f64N/A
add-sqr-sqrtN/A
associate-*r*N/A
add-cube-cbrtN/A
pow3N/A
sqrt-pow1N/A
metadata-evalN/A
metadata-evalN/A
pow-plusN/A
pow1/2N/A
*-commutativeN/A
associate-*r*N/A
pow1/2N/A
add-sqr-sqrtN/A
cbrt-prodN/A
pow2N/A
pow-powN/A
metadata-evalN/A
unpow1N/A
Applied rewrites99.8%
Taylor expanded in angle around 0
*-commutativeN/A
lower-fma.f64N/A
Applied rewrites55.0%
Taylor expanded in a around 0
Applied rewrites73.2%
Applied rewrites86.6%
angle_m = (fabs.f64 angle)
(FPCore (a b angle_m)
:precision binary64
(if (<= a 4.1e+129)
(fma
(*
(fma (* 3.08641975308642e-5 b) b (* (* -3.08641975308642e-5 a) a))
(* (* (PI) (PI)) angle_m))
angle_m
(* a a))
(* a a)))\begin{array}{l}
angle_m = \left|angle\right|
\\
\begin{array}{l}
\mathbf{if}\;a \leq 4.1 \cdot 10^{+129}:\\
\;\;\;\;\mathsf{fma}\left(\mathsf{fma}\left(3.08641975308642 \cdot 10^{-5} \cdot b, b, \left(-3.08641975308642 \cdot 10^{-5} \cdot a\right) \cdot a\right) \cdot \left(\left(\mathsf{PI}\left(\right) \cdot \mathsf{PI}\left(\right)\right) \cdot angle\_m\right), angle\_m, a \cdot a\right)\\
\mathbf{else}:\\
\;\;\;\;a \cdot a\\
\end{array}
\end{array}
if a < 4.1000000000000003e129Initial program 73.6%
lift-*.f64N/A
*-commutativeN/A
lift-PI.f64N/A
add-sqr-sqrtN/A
associate-*r*N/A
add-cube-cbrtN/A
pow3N/A
sqrt-pow1N/A
metadata-evalN/A
metadata-evalN/A
pow-plusN/A
pow1/2N/A
*-commutativeN/A
associate-*r*N/A
pow1/2N/A
add-sqr-sqrtN/A
cbrt-prodN/A
pow2N/A
pow-powN/A
metadata-evalN/A
unpow1N/A
Applied rewrites73.6%
Taylor expanded in angle around 0
*-commutativeN/A
lower-fma.f64N/A
Applied rewrites41.5%
Applied rewrites47.3%
if 4.1000000000000003e129 < a Initial program 91.7%
Taylor expanded in angle around 0
unpow2N/A
lower-*.f6485.7
Applied rewrites85.7%
angle_m = (fabs.f64 angle)
(FPCore (a b angle_m)
:precision binary64
(if (<= b 7.5e-112)
(* a a)
(fma
(* (* (* (* (PI) (PI)) 3.08641975308642e-5) b) b)
(* angle_m angle_m)
(* a a))))\begin{array}{l}
angle_m = \left|angle\right|
\\
\begin{array}{l}
\mathbf{if}\;b \leq 7.5 \cdot 10^{-112}:\\
\;\;\;\;a \cdot a\\
\mathbf{else}:\\
\;\;\;\;\mathsf{fma}\left(\left(\left(\left(\mathsf{PI}\left(\right) \cdot \mathsf{PI}\left(\right)\right) \cdot 3.08641975308642 \cdot 10^{-5}\right) \cdot b\right) \cdot b, angle\_m \cdot angle\_m, a \cdot a\right)\\
\end{array}
\end{array}
if b < 7.5000000000000002e-112Initial program 74.4%
Taylor expanded in angle around 0
unpow2N/A
lower-*.f6458.0
Applied rewrites58.0%
if 7.5000000000000002e-112 < b Initial program 79.4%
lift-*.f64N/A
*-commutativeN/A
lift-PI.f64N/A
add-sqr-sqrtN/A
associate-*r*N/A
add-cube-cbrtN/A
pow3N/A
sqrt-pow1N/A
metadata-evalN/A
metadata-evalN/A
pow-plusN/A
pow1/2N/A
*-commutativeN/A
associate-*r*N/A
pow1/2N/A
add-sqr-sqrtN/A
cbrt-prodN/A
pow2N/A
pow-powN/A
metadata-evalN/A
unpow1N/A
Applied rewrites79.4%
Taylor expanded in angle around 0
*-commutativeN/A
lower-fma.f64N/A
Applied rewrites38.5%
Taylor expanded in a around 0
Applied rewrites64.6%
angle_m = (fabs.f64 angle) (FPCore (a b angle_m) :precision binary64 (if (<= b 1.75e+154) (* a a) (* (* 3.08641975308642e-5 (* (* (* angle_m angle_m) b) b)) (* (PI) (PI)))))
\begin{array}{l}
angle_m = \left|angle\right|
\\
\begin{array}{l}
\mathbf{if}\;b \leq 1.75 \cdot 10^{+154}:\\
\;\;\;\;a \cdot a\\
\mathbf{else}:\\
\;\;\;\;\left(3.08641975308642 \cdot 10^{-5} \cdot \left(\left(\left(angle\_m \cdot angle\_m\right) \cdot b\right) \cdot b\right)\right) \cdot \left(\mathsf{PI}\left(\right) \cdot \mathsf{PI}\left(\right)\right)\\
\end{array}
\end{array}
if b < 1.7500000000000001e154Initial program 73.5%
Taylor expanded in angle around 0
unpow2N/A
lower-*.f6457.2
Applied rewrites57.2%
if 1.7500000000000001e154 < b Initial program 99.8%
lift-*.f64N/A
*-commutativeN/A
lift-PI.f64N/A
add-sqr-sqrtN/A
associate-*r*N/A
add-cube-cbrtN/A
pow3N/A
sqrt-pow1N/A
metadata-evalN/A
metadata-evalN/A
pow-plusN/A
pow1/2N/A
*-commutativeN/A
associate-*r*N/A
pow1/2N/A
add-sqr-sqrtN/A
cbrt-prodN/A
pow2N/A
pow-powN/A
metadata-evalN/A
unpow1N/A
Applied rewrites99.8%
Taylor expanded in angle around 0
*-commutativeN/A
lower-fma.f64N/A
Applied rewrites52.4%
Taylor expanded in a around 0
Applied rewrites76.4%
Taylor expanded in a around 0
Applied rewrites79.8%
angle_m = (fabs.f64 angle) (FPCore (a b angle_m) :precision binary64 (* a a))
angle_m = fabs(angle);
double code(double a, double b, double angle_m) {
return a * a;
}
angle_m = abs(angle)
real(8) function code(a, b, angle_m)
real(8), intent (in) :: a
real(8), intent (in) :: b
real(8), intent (in) :: angle_m
code = a * a
end function
angle_m = Math.abs(angle);
public static double code(double a, double b, double angle_m) {
return a * a;
}
angle_m = math.fabs(angle) def code(a, b, angle_m): return a * a
angle_m = abs(angle) function code(a, b, angle_m) return Float64(a * a) end
angle_m = abs(angle); function tmp = code(a, b, angle_m) tmp = a * a; end
angle_m = N[Abs[angle], $MachinePrecision] code[a_, b_, angle$95$m_] := N[(a * a), $MachinePrecision]
\begin{array}{l}
angle_m = \left|angle\right|
\\
a \cdot a
\end{array}
Initial program 76.1%
Taylor expanded in angle around 0
unpow2N/A
lower-*.f6455.3
Applied rewrites55.3%
herbie shell --seed 2024296
(FPCore (a b angle)
:name "ab-angle->ABCF C"
:precision binary64
(+ (pow (* a (cos (* (PI) (/ angle 180.0)))) 2.0) (pow (* b (sin (* (PI) (/ angle 180.0)))) 2.0)))