rsin B (should all be same)

Percentage Accurate: 77.3% → 99.5%
Time: 12.8s
Alternatives: 14
Speedup: 69.0×

Specification

?
\[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]

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 14 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.

Alternative 1: 99.5% accurate, 0.3× speedup?

\[\frac{r \cdot \sin b}{\mathsf{fma}\left(\cos b, \cos a, \mathsf{log1p}\left(\mathsf{expm1}\left(\sin a \cdot \left(-\sin b\right)\right)\right)\right)} \]
Derivation
  1. Initial program 81.7%

    \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
  2. Step-by-step derivation
    1. associate-*r/81.6%

      \[\leadsto \color{blue}{\frac{r \cdot \sin b}{\cos \left(a + b\right)}} \]
    2. +-commutative81.6%

      \[\leadsto \frac{r \cdot \sin b}{\cos \color{blue}{\left(b + a\right)}} \]
  3. Simplified81.6%

    \[\leadsto \color{blue}{\frac{r \cdot \sin b}{\cos \left(b + a\right)}} \]
  4. Step-by-step derivation
    1. cos-sum99.5%

      \[\leadsto \frac{r \cdot \sin b}{\color{blue}{\cos b \cdot \cos a - \sin b \cdot \sin a}} \]
    2. cancel-sign-sub-inv99.5%

      \[\leadsto \frac{r \cdot \sin b}{\color{blue}{\cos b \cdot \cos a + \left(-\sin b\right) \cdot \sin a}} \]
    3. fma-def99.6%

      \[\leadsto \frac{r \cdot \sin b}{\color{blue}{\mathsf{fma}\left(\cos b, \cos a, \left(-\sin b\right) \cdot \sin a\right)}} \]
  5. Applied egg-rr99.6%

    \[\leadsto \frac{r \cdot \sin b}{\color{blue}{\mathsf{fma}\left(\cos b, \cos a, \left(-\sin b\right) \cdot \sin a\right)}} \]
  6. Step-by-step derivation
    1. log1p-expm1-u99.6%

      \[\leadsto \frac{r \cdot \sin b}{\mathsf{fma}\left(\cos b, \cos a, \color{blue}{\mathsf{log1p}\left(\mathsf{expm1}\left(\left(-\sin b\right) \cdot \sin a\right)\right)}\right)} \]
    2. distribute-lft-neg-out99.6%

      \[\leadsto \frac{r \cdot \sin b}{\mathsf{fma}\left(\cos b, \cos a, \mathsf{log1p}\left(\mathsf{expm1}\left(\color{blue}{-\sin b \cdot \sin a}\right)\right)\right)} \]
  7. Applied egg-rr99.6%

    \[\leadsto \frac{r \cdot \sin b}{\mathsf{fma}\left(\cos b, \cos a, \color{blue}{\mathsf{log1p}\left(\mathsf{expm1}\left(-\sin b \cdot \sin a\right)\right)}\right)} \]
  8. Final simplification99.6%

    \[\leadsto \frac{r \cdot \sin b}{\mathsf{fma}\left(\cos b, \cos a, \mathsf{log1p}\left(\mathsf{expm1}\left(\sin a \cdot \left(-\sin b\right)\right)\right)\right)} \]

Alternative 2: 99.5% accurate, 0.3× speedup?

\[\frac{r \cdot \sin b}{\mathsf{fma}\left(\cos b, \cos a, \sin a \cdot \left(-\sin b\right)\right)} \]
Derivation
  1. Initial program 81.7%

    \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
  2. Step-by-step derivation
    1. associate-*r/81.6%

      \[\leadsto \color{blue}{\frac{r \cdot \sin b}{\cos \left(a + b\right)}} \]
    2. +-commutative81.6%

      \[\leadsto \frac{r \cdot \sin b}{\cos \color{blue}{\left(b + a\right)}} \]
  3. Simplified81.6%

    \[\leadsto \color{blue}{\frac{r \cdot \sin b}{\cos \left(b + a\right)}} \]
  4. Step-by-step derivation
    1. cos-sum99.5%

      \[\leadsto \frac{r \cdot \sin b}{\color{blue}{\cos b \cdot \cos a - \sin b \cdot \sin a}} \]
    2. cancel-sign-sub-inv99.5%

      \[\leadsto \frac{r \cdot \sin b}{\color{blue}{\cos b \cdot \cos a + \left(-\sin b\right) \cdot \sin a}} \]
    3. fma-def99.6%

      \[\leadsto \frac{r \cdot \sin b}{\color{blue}{\mathsf{fma}\left(\cos b, \cos a, \left(-\sin b\right) \cdot \sin a\right)}} \]
  5. Applied egg-rr99.6%

    \[\leadsto \frac{r \cdot \sin b}{\color{blue}{\mathsf{fma}\left(\cos b, \cos a, \left(-\sin b\right) \cdot \sin a\right)}} \]
  6. Final simplification99.6%

    \[\leadsto \frac{r \cdot \sin b}{\mathsf{fma}\left(\cos b, \cos a, \sin a \cdot \left(-\sin b\right)\right)} \]

Alternative 3: 99.5% accurate, 0.4× speedup?

\[r \cdot \frac{\sin b}{\cos b \cdot \cos a - \sin b \cdot \sin a} \]
Derivation
  1. Initial program 81.7%

    \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
  2. Step-by-step derivation
    1. +-commutative81.7%

      \[\leadsto r \cdot \frac{\sin b}{\cos \color{blue}{\left(b + a\right)}} \]
  3. Simplified81.7%

    \[\leadsto \color{blue}{r \cdot \frac{\sin b}{\cos \left(b + a\right)}} \]
  4. Step-by-step derivation
    1. cos-sum99.6%

      \[\leadsto r \cdot \frac{\sin b}{\color{blue}{\cos b \cdot \cos a - \sin b \cdot \sin a}} \]
  5. Applied egg-rr99.6%

    \[\leadsto r \cdot \frac{\sin b}{\color{blue}{\cos b \cdot \cos a - \sin b \cdot \sin a}} \]
  6. Final simplification99.6%

    \[\leadsto r \cdot \frac{\sin b}{\cos b \cdot \cos a - \sin b \cdot \sin a} \]

Alternative 4: 78.2% accurate, 0.7× speedup?

\[r \cdot \frac{\sin b}{\cos b \cdot \cos a} \]
Derivation
  1. Initial program 81.7%

    \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
  2. Step-by-step derivation
    1. associate-*r/81.6%

      \[\leadsto \color{blue}{\frac{r \cdot \sin b}{\cos \left(a + b\right)}} \]
    2. +-commutative81.6%

      \[\leadsto \frac{r \cdot \sin b}{\cos \color{blue}{\left(b + a\right)}} \]
  3. Simplified81.6%

    \[\leadsto \color{blue}{\frac{r \cdot \sin b}{\cos \left(b + a\right)}} \]
  4. Step-by-step derivation
    1. cos-sum99.5%

      \[\leadsto \frac{r \cdot \sin b}{\color{blue}{\cos b \cdot \cos a - \sin b \cdot \sin a}} \]
    2. cancel-sign-sub-inv99.5%

      \[\leadsto \frac{r \cdot \sin b}{\color{blue}{\cos b \cdot \cos a + \left(-\sin b\right) \cdot \sin a}} \]
    3. fma-def99.6%

      \[\leadsto \frac{r \cdot \sin b}{\color{blue}{\mathsf{fma}\left(\cos b, \cos a, \left(-\sin b\right) \cdot \sin a\right)}} \]
  5. Applied egg-rr99.6%

    \[\leadsto \frac{r \cdot \sin b}{\color{blue}{\mathsf{fma}\left(\cos b, \cos a, \left(-\sin b\right) \cdot \sin a\right)}} \]
  6. Step-by-step derivation
    1. log1p-expm1-u99.6%

      \[\leadsto \frac{r \cdot \sin b}{\mathsf{fma}\left(\cos b, \cos a, \color{blue}{\mathsf{log1p}\left(\mathsf{expm1}\left(\left(-\sin b\right) \cdot \sin a\right)\right)}\right)} \]
    2. distribute-lft-neg-out99.6%

      \[\leadsto \frac{r \cdot \sin b}{\mathsf{fma}\left(\cos b, \cos a, \mathsf{log1p}\left(\mathsf{expm1}\left(\color{blue}{-\sin b \cdot \sin a}\right)\right)\right)} \]
  7. Applied egg-rr99.6%

    \[\leadsto \frac{r \cdot \sin b}{\mathsf{fma}\left(\cos b, \cos a, \color{blue}{\mathsf{log1p}\left(\mathsf{expm1}\left(-\sin b \cdot \sin a\right)\right)}\right)} \]
  8. Taylor expanded in r around 0 99.5%

    \[\leadsto \color{blue}{\frac{\sin b \cdot r}{\cos a \cdot \cos b - \sin a \cdot \sin b}} \]
  9. Step-by-step derivation
    1. associate-/l*99.4%

      \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos a \cdot \cos b - \sin a \cdot \sin b}{r}}} \]
    2. associate-/r/99.6%

      \[\leadsto \color{blue}{\frac{\sin b}{\cos a \cdot \cos b - \sin a \cdot \sin b} \cdot r} \]
    3. *-commutative99.6%

      \[\leadsto \frac{\sin b}{\cos a \cdot \cos b - \color{blue}{\sin b \cdot \sin a}} \cdot r \]
  10. Simplified99.6%

    \[\leadsto \color{blue}{\frac{\sin b}{\cos a \cdot \cos b - \sin b \cdot \sin a} \cdot r} \]
  11. Step-by-step derivation
    1. sin-mult82.6%

      \[\leadsto \frac{\sin b}{\cos a \cdot \cos b - \color{blue}{\frac{\cos \left(b - a\right) - \cos \left(b + a\right)}{2}}} \cdot r \]
    2. div-sub82.6%

      \[\leadsto \frac{\sin b}{\cos a \cdot \cos b - \color{blue}{\left(\frac{\cos \left(b - a\right)}{2} - \frac{\cos \left(b + a\right)}{2}\right)}} \cdot r \]
    3. cos-diff82.5%

      \[\leadsto \frac{\sin b}{\cos a \cdot \cos b - \left(\frac{\color{blue}{\cos b \cdot \cos a + \sin b \cdot \sin a}}{2} - \frac{\cos \left(b + a\right)}{2}\right)} \cdot r \]
    4. add-sqr-sqrt46.8%

      \[\leadsto \frac{\sin b}{\cos a \cdot \cos b - \left(\frac{\cos b \cdot \cos a + \color{blue}{\sqrt{\sin b \cdot \sin a} \cdot \sqrt{\sin b \cdot \sin a}}}{2} - \frac{\cos \left(b + a\right)}{2}\right)} \cdot r \]
    5. sqrt-unprod82.1%

      \[\leadsto \frac{\sin b}{\cos a \cdot \cos b - \left(\frac{\cos b \cdot \cos a + \color{blue}{\sqrt{\left(\sin b \cdot \sin a\right) \cdot \left(\sin b \cdot \sin a\right)}}}{2} - \frac{\cos \left(b + a\right)}{2}\right)} \cdot r \]
    6. sqr-neg82.1%

      \[\leadsto \frac{\sin b}{\cos a \cdot \cos b - \left(\frac{\cos b \cdot \cos a + \sqrt{\color{blue}{\left(-\sin b \cdot \sin a\right) \cdot \left(-\sin b \cdot \sin a\right)}}}{2} - \frac{\cos \left(b + a\right)}{2}\right)} \cdot r \]
    7. sqrt-unprod49.8%

      \[\leadsto \frac{\sin b}{\cos a \cdot \cos b - \left(\frac{\cos b \cdot \cos a + \color{blue}{\sqrt{-\sin b \cdot \sin a} \cdot \sqrt{-\sin b \cdot \sin a}}}{2} - \frac{\cos \left(b + a\right)}{2}\right)} \cdot r \]
    8. add-sqr-sqrt81.4%

      \[\leadsto \frac{\sin b}{\cos a \cdot \cos b - \left(\frac{\cos b \cdot \cos a + \color{blue}{\left(-\sin b \cdot \sin a\right)}}{2} - \frac{\cos \left(b + a\right)}{2}\right)} \cdot r \]
    9. sub-neg81.4%

      \[\leadsto \frac{\sin b}{\cos a \cdot \cos b - \left(\frac{\color{blue}{\cos b \cdot \cos a - \sin b \cdot \sin a}}{2} - \frac{\cos \left(b + a\right)}{2}\right)} \cdot r \]
    10. cos-sum82.5%

      \[\leadsto \frac{\sin b}{\cos a \cdot \cos b - \left(\frac{\color{blue}{\cos \left(b + a\right)}}{2} - \frac{\cos \left(b + a\right)}{2}\right)} \cdot r \]
  12. Applied egg-rr82.5%

    \[\leadsto \frac{\sin b}{\cos a \cdot \cos b - \color{blue}{\left(\frac{\cos \left(b + a\right)}{2} - \frac{\cos \left(b + a\right)}{2}\right)}} \cdot r \]
  13. Step-by-step derivation
    1. +-inverses82.5%

      \[\leadsto \frac{\sin b}{\cos a \cdot \cos b - \color{blue}{0}} \cdot r \]
  14. Simplified82.5%

    \[\leadsto \frac{\sin b}{\cos a \cdot \cos b - \color{blue}{0}} \cdot r \]
  15. Final simplification82.5%

    \[\leadsto r \cdot \frac{\sin b}{\cos b \cdot \cos a} \]

Alternative 5: 76.5% accurate, 1.0× speedup?

\[\begin{array}{l} \mathbf{if}\;a \leq -6.5 \lor \neg \left(a \leq 5.7 \cdot 10^{+14}\right):\\ \;\;\;\;r \cdot \frac{\sin b}{\cos a}\\ \mathbf{else}:\\ \;\;\;\;r \cdot \frac{\sin b}{\cos b}\\ \end{array} \]
Derivation
  1. Split input into 2 regimes
  2. if a < -6.5 or 5.7e14 < a

    1. Initial program 62.3%

      \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
    2. Step-by-step derivation
      1. +-commutative62.3%

        \[\leadsto r \cdot \frac{\sin b}{\cos \color{blue}{\left(b + a\right)}} \]
    3. Simplified62.3%

      \[\leadsto \color{blue}{r \cdot \frac{\sin b}{\cos \left(b + a\right)}} \]
    4. Taylor expanded in b around 0 62.8%

      \[\leadsto r \cdot \frac{\sin b}{\color{blue}{\cos a}} \]

    if -6.5 < a < 5.7e14

    1. Initial program 97.5%

      \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
    2. Step-by-step derivation
      1. +-commutative97.5%

        \[\leadsto r \cdot \frac{\sin b}{\cos \color{blue}{\left(b + a\right)}} \]
    3. Simplified97.5%

      \[\leadsto \color{blue}{r \cdot \frac{\sin b}{\cos \left(b + a\right)}} \]
    4. Taylor expanded in a around 0 97.5%

      \[\leadsto r \cdot \frac{\sin b}{\color{blue}{\cos b}} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification81.9%

    \[\leadsto \begin{array}{l} \mathbf{if}\;a \leq -6.5 \lor \neg \left(a \leq 5.7 \cdot 10^{+14}\right):\\ \;\;\;\;r \cdot \frac{\sin b}{\cos a}\\ \mathbf{else}:\\ \;\;\;\;r \cdot \frac{\sin b}{\cos b}\\ \end{array} \]

Alternative 6: 76.5% accurate, 1.0× speedup?

\[\begin{array}{l} \mathbf{if}\;a \leq -6.5 \lor \neg \left(a \leq 5.7 \cdot 10^{+14}\right):\\ \;\;\;\;\frac{r}{\frac{\cos a}{\sin b}}\\ \mathbf{else}:\\ \;\;\;\;r \cdot \frac{\sin b}{\cos b}\\ \end{array} \]
Derivation
  1. Split input into 2 regimes
  2. if a < -6.5 or 5.7e14 < a

    1. Initial program 62.3%

      \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
    2. Step-by-step derivation
      1. *-commutative62.3%

        \[\leadsto \color{blue}{\frac{\sin b}{\cos \left(a + b\right)} \cdot r} \]
      2. associate-/r/62.3%

        \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos \left(a + b\right)}{r}}} \]
      3. +-commutative62.3%

        \[\leadsto \frac{\sin b}{\frac{\cos \color{blue}{\left(b + a\right)}}{r}} \]
    3. Simplified62.3%

      \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos \left(b + a\right)}{r}}} \]
    4. Step-by-step derivation
      1. associate-/l*62.3%

        \[\leadsto \color{blue}{\frac{\sin b \cdot r}{\cos \left(b + a\right)}} \]
      2. *-commutative62.3%

        \[\leadsto \frac{\color{blue}{r \cdot \sin b}}{\cos \left(b + a\right)} \]
      3. clear-num62.3%

        \[\leadsto \color{blue}{\frac{1}{\frac{\cos \left(b + a\right)}{r \cdot \sin b}}} \]
      4. associate-/r/62.2%

        \[\leadsto \color{blue}{\frac{1}{\cos \left(b + a\right)} \cdot \left(r \cdot \sin b\right)} \]
      5. *-commutative62.2%

        \[\leadsto \frac{1}{\cos \left(b + a\right)} \cdot \color{blue}{\left(\sin b \cdot r\right)} \]
    5. Applied egg-rr62.2%

      \[\leadsto \color{blue}{\frac{1}{\cos \left(b + a\right)} \cdot \left(\sin b \cdot r\right)} \]
    6. Taylor expanded in b around 0 62.7%

      \[\leadsto \color{blue}{\frac{1}{\cos a}} \cdot \left(\sin b \cdot r\right) \]
    7. Step-by-step derivation
      1. associate-*l/62.8%

        \[\leadsto \color{blue}{\frac{1 \cdot \left(\sin b \cdot r\right)}{\cos a}} \]
      2. *-un-lft-identity62.8%

        \[\leadsto \frac{\color{blue}{\sin b \cdot r}}{\cos a} \]
      3. *-commutative62.8%

        \[\leadsto \frac{\color{blue}{r \cdot \sin b}}{\cos a} \]
      4. associate-/l*62.8%

        \[\leadsto \color{blue}{\frac{r}{\frac{\cos a}{\sin b}}} \]
    8. Applied egg-rr62.8%

      \[\leadsto \color{blue}{\frac{r}{\frac{\cos a}{\sin b}}} \]

    if -6.5 < a < 5.7e14

    1. Initial program 97.5%

      \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
    2. Step-by-step derivation
      1. +-commutative97.5%

        \[\leadsto r \cdot \frac{\sin b}{\cos \color{blue}{\left(b + a\right)}} \]
    3. Simplified97.5%

      \[\leadsto \color{blue}{r \cdot \frac{\sin b}{\cos \left(b + a\right)}} \]
    4. Taylor expanded in a around 0 97.5%

      \[\leadsto r \cdot \frac{\sin b}{\color{blue}{\cos b}} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification81.9%

    \[\leadsto \begin{array}{l} \mathbf{if}\;a \leq -6.5 \lor \neg \left(a \leq 5.7 \cdot 10^{+14}\right):\\ \;\;\;\;\frac{r}{\frac{\cos a}{\sin b}}\\ \mathbf{else}:\\ \;\;\;\;r \cdot \frac{\sin b}{\cos b}\\ \end{array} \]

Alternative 7: 76.5% accurate, 1.0× speedup?

\[\begin{array}{l} \mathbf{if}\;a \leq -6.5:\\ \;\;\;\;\frac{\sin b}{\frac{\cos a}{r}}\\ \mathbf{elif}\;a \leq 5.7 \cdot 10^{+14}:\\ \;\;\;\;r \cdot \frac{\sin b}{\cos b}\\ \mathbf{else}:\\ \;\;\;\;\frac{r}{\frac{\cos a}{\sin b}}\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if a < -6.5

    1. Initial program 67.2%

      \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
    2. Step-by-step derivation
      1. *-commutative67.2%

        \[\leadsto \color{blue}{\frac{\sin b}{\cos \left(a + b\right)} \cdot r} \]
      2. associate-/r/67.3%

        \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos \left(a + b\right)}{r}}} \]
      3. +-commutative67.3%

        \[\leadsto \frac{\sin b}{\frac{\cos \color{blue}{\left(b + a\right)}}{r}} \]
    3. Simplified67.3%

      \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos \left(b + a\right)}{r}}} \]
    4. Taylor expanded in b around 0 67.4%

      \[\leadsto \frac{\sin b}{\frac{\color{blue}{\cos a}}{r}} \]

    if -6.5 < a < 5.7e14

    1. Initial program 97.5%

      \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
    2. Step-by-step derivation
      1. +-commutative97.5%

        \[\leadsto r \cdot \frac{\sin b}{\cos \color{blue}{\left(b + a\right)}} \]
    3. Simplified97.5%

      \[\leadsto \color{blue}{r \cdot \frac{\sin b}{\cos \left(b + a\right)}} \]
    4. Taylor expanded in a around 0 97.5%

      \[\leadsto r \cdot \frac{\sin b}{\color{blue}{\cos b}} \]

    if 5.7e14 < a

    1. Initial program 55.6%

      \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
    2. Step-by-step derivation
      1. *-commutative55.6%

        \[\leadsto \color{blue}{\frac{\sin b}{\cos \left(a + b\right)} \cdot r} \]
      2. associate-/r/55.5%

        \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos \left(a + b\right)}{r}}} \]
      3. +-commutative55.5%

        \[\leadsto \frac{\sin b}{\frac{\cos \color{blue}{\left(b + a\right)}}{r}} \]
    3. Simplified55.5%

      \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos \left(b + a\right)}{r}}} \]
    4. Step-by-step derivation
      1. associate-/l*55.6%

        \[\leadsto \color{blue}{\frac{\sin b \cdot r}{\cos \left(b + a\right)}} \]
      2. *-commutative55.6%

        \[\leadsto \frac{\color{blue}{r \cdot \sin b}}{\cos \left(b + a\right)} \]
      3. clear-num55.7%

        \[\leadsto \color{blue}{\frac{1}{\frac{\cos \left(b + a\right)}{r \cdot \sin b}}} \]
      4. associate-/r/55.5%

        \[\leadsto \color{blue}{\frac{1}{\cos \left(b + a\right)} \cdot \left(r \cdot \sin b\right)} \]
      5. *-commutative55.5%

        \[\leadsto \frac{1}{\cos \left(b + a\right)} \cdot \color{blue}{\left(\sin b \cdot r\right)} \]
    5. Applied egg-rr55.5%

      \[\leadsto \color{blue}{\frac{1}{\cos \left(b + a\right)} \cdot \left(\sin b \cdot r\right)} \]
    6. Taylor expanded in b around 0 56.5%

      \[\leadsto \color{blue}{\frac{1}{\cos a}} \cdot \left(\sin b \cdot r\right) \]
    7. Step-by-step derivation
      1. associate-*l/56.6%

        \[\leadsto \color{blue}{\frac{1 \cdot \left(\sin b \cdot r\right)}{\cos a}} \]
      2. *-un-lft-identity56.6%

        \[\leadsto \frac{\color{blue}{\sin b \cdot r}}{\cos a} \]
      3. *-commutative56.6%

        \[\leadsto \frac{\color{blue}{r \cdot \sin b}}{\cos a} \]
      4. associate-/l*56.6%

        \[\leadsto \color{blue}{\frac{r}{\frac{\cos a}{\sin b}}} \]
    8. Applied egg-rr56.6%

      \[\leadsto \color{blue}{\frac{r}{\frac{\cos a}{\sin b}}} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification81.9%

    \[\leadsto \begin{array}{l} \mathbf{if}\;a \leq -6.5:\\ \;\;\;\;\frac{\sin b}{\frac{\cos a}{r}}\\ \mathbf{elif}\;a \leq 5.7 \cdot 10^{+14}:\\ \;\;\;\;r \cdot \frac{\sin b}{\cos b}\\ \mathbf{else}:\\ \;\;\;\;\frac{r}{\frac{\cos a}{\sin b}}\\ \end{array} \]

Alternative 8: 77.3% accurate, 1.0× speedup?

\[r \cdot \frac{\sin b}{\cos \left(b + a\right)} \]
Derivation
  1. Initial program 81.7%

    \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
  2. Final simplification81.7%

    \[\leadsto r \cdot \frac{\sin b}{\cos \left(b + a\right)} \]

Alternative 9: 55.5% accurate, 1.0× speedup?

\[r \cdot \frac{\sin b}{\cos a} \]
Derivation
  1. Initial program 81.7%

    \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
  2. Step-by-step derivation
    1. +-commutative81.7%

      \[\leadsto r \cdot \frac{\sin b}{\cos \color{blue}{\left(b + a\right)}} \]
  3. Simplified81.7%

    \[\leadsto \color{blue}{r \cdot \frac{\sin b}{\cos \left(b + a\right)}} \]
  4. Taylor expanded in b around 0 59.8%

    \[\leadsto r \cdot \frac{\sin b}{\color{blue}{\cos a}} \]
  5. Final simplification59.8%

    \[\leadsto r \cdot \frac{\sin b}{\cos a} \]

Alternative 10: 53.5% accurate, 1.9× speedup?

\[\begin{array}{l} \mathbf{if}\;b \leq -3.2 \cdot 10^{+23}:\\ \;\;\;\;r \cdot \sin b\\ \mathbf{else}:\\ \;\;\;\;\frac{r \cdot b}{\cos \left(b + a\right)}\\ \end{array} \]
Derivation
  1. Split input into 2 regimes
  2. if b < -3.2e23

    1. Initial program 67.9%

      \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
    2. Step-by-step derivation
      1. *-commutative67.9%

        \[\leadsto \color{blue}{\frac{\sin b}{\cos \left(a + b\right)} \cdot r} \]
      2. associate-/r/67.9%

        \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos \left(a + b\right)}{r}}} \]
      3. +-commutative67.9%

        \[\leadsto \frac{\sin b}{\frac{\cos \color{blue}{\left(b + a\right)}}{r}} \]
    3. Simplified67.9%

      \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos \left(b + a\right)}{r}}} \]
    4. Taylor expanded in b around 0 9.2%

      \[\leadsto \frac{\sin b}{\color{blue}{\frac{\cos a}{r} + -1 \cdot \frac{\sin a \cdot b}{r}}} \]
    5. Step-by-step derivation
      1. mul-1-neg9.2%

        \[\leadsto \frac{\sin b}{\frac{\cos a}{r} + \color{blue}{\left(-\frac{\sin a \cdot b}{r}\right)}} \]
      2. unsub-neg9.2%

        \[\leadsto \frac{\sin b}{\color{blue}{\frac{\cos a}{r} - \frac{\sin a \cdot b}{r}}} \]
      3. associate-/l*8.7%

        \[\leadsto \frac{\sin b}{\frac{\cos a}{r} - \color{blue}{\frac{\sin a}{\frac{r}{b}}}} \]
    6. Simplified8.7%

      \[\leadsto \frac{\sin b}{\color{blue}{\frac{\cos a}{r} - \frac{\sin a}{\frac{r}{b}}}} \]
    7. Taylor expanded in a around 0 12.2%

      \[\leadsto \color{blue}{\sin b \cdot r} \]

    if -3.2e23 < b

    1. Initial program 85.9%

      \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
    2. Step-by-step derivation
      1. associate-*r/85.9%

        \[\leadsto \color{blue}{\frac{r \cdot \sin b}{\cos \left(a + b\right)}} \]
      2. +-commutative85.9%

        \[\leadsto \frac{r \cdot \sin b}{\cos \color{blue}{\left(b + a\right)}} \]
    3. Simplified85.9%

      \[\leadsto \color{blue}{\frac{r \cdot \sin b}{\cos \left(b + a\right)}} \]
    4. Taylor expanded in b around 0 72.6%

      \[\leadsto \frac{\color{blue}{r \cdot b}}{\cos \left(b + a\right)} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification58.4%

    \[\leadsto \begin{array}{l} \mathbf{if}\;b \leq -3.2 \cdot 10^{+23}:\\ \;\;\;\;r \cdot \sin b\\ \mathbf{else}:\\ \;\;\;\;\frac{r \cdot b}{\cos \left(b + a\right)}\\ \end{array} \]

Alternative 11: 53.6% accurate, 1.9× speedup?

\[\begin{array}{l} \mathbf{if}\;b \leq -1.66:\\ \;\;\;\;r \cdot \sin b\\ \mathbf{else}:\\ \;\;\;\;r \cdot \frac{b}{\cos a}\\ \end{array} \]
Derivation
  1. Split input into 2 regimes
  2. if b < -1.65999999999999992

    1. Initial program 67.6%

      \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
    2. Step-by-step derivation
      1. *-commutative67.6%

        \[\leadsto \color{blue}{\frac{\sin b}{\cos \left(a + b\right)} \cdot r} \]
      2. associate-/r/67.5%

        \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos \left(a + b\right)}{r}}} \]
      3. +-commutative67.5%

        \[\leadsto \frac{\sin b}{\frac{\cos \color{blue}{\left(b + a\right)}}{r}} \]
    3. Simplified67.5%

      \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos \left(b + a\right)}{r}}} \]
    4. Taylor expanded in b around 0 9.0%

      \[\leadsto \frac{\sin b}{\color{blue}{\frac{\cos a}{r} + -1 \cdot \frac{\sin a \cdot b}{r}}} \]
    5. Step-by-step derivation
      1. mul-1-neg9.0%

        \[\leadsto \frac{\sin b}{\frac{\cos a}{r} + \color{blue}{\left(-\frac{\sin a \cdot b}{r}\right)}} \]
      2. unsub-neg9.0%

        \[\leadsto \frac{\sin b}{\color{blue}{\frac{\cos a}{r} - \frac{\sin a \cdot b}{r}}} \]
      3. associate-/l*8.5%

        \[\leadsto \frac{\sin b}{\frac{\cos a}{r} - \color{blue}{\frac{\sin a}{\frac{r}{b}}}} \]
    6. Simplified8.5%

      \[\leadsto \frac{\sin b}{\color{blue}{\frac{\cos a}{r} - \frac{\sin a}{\frac{r}{b}}}} \]
    7. Taylor expanded in a around 0 12.1%

      \[\leadsto \color{blue}{\sin b \cdot r} \]

    if -1.65999999999999992 < b

    1. Initial program 86.2%

      \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
    2. Step-by-step derivation
      1. +-commutative86.2%

        \[\leadsto r \cdot \frac{\sin b}{\cos \color{blue}{\left(b + a\right)}} \]
    3. Simplified86.2%

      \[\leadsto \color{blue}{r \cdot \frac{\sin b}{\cos \left(b + a\right)}} \]
    4. Taylor expanded in b around 0 72.9%

      \[\leadsto r \cdot \color{blue}{\frac{b}{\cos a}} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification58.2%

    \[\leadsto \begin{array}{l} \mathbf{if}\;b \leq -1.66:\\ \;\;\;\;r \cdot \sin b\\ \mathbf{else}:\\ \;\;\;\;r \cdot \frac{b}{\cos a}\\ \end{array} \]

Alternative 12: 53.6% accurate, 1.9× speedup?

\[\begin{array}{l} \mathbf{if}\;b \leq -4.7:\\ \;\;\;\;r \cdot \sin b\\ \mathbf{else}:\\ \;\;\;\;\frac{r \cdot b}{\cos a}\\ \end{array} \]
Derivation
  1. Split input into 2 regimes
  2. if b < -4.70000000000000018

    1. Initial program 67.6%

      \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
    2. Step-by-step derivation
      1. *-commutative67.6%

        \[\leadsto \color{blue}{\frac{\sin b}{\cos \left(a + b\right)} \cdot r} \]
      2. associate-/r/67.5%

        \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos \left(a + b\right)}{r}}} \]
      3. +-commutative67.5%

        \[\leadsto \frac{\sin b}{\frac{\cos \color{blue}{\left(b + a\right)}}{r}} \]
    3. Simplified67.5%

      \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos \left(b + a\right)}{r}}} \]
    4. Taylor expanded in b around 0 9.0%

      \[\leadsto \frac{\sin b}{\color{blue}{\frac{\cos a}{r} + -1 \cdot \frac{\sin a \cdot b}{r}}} \]
    5. Step-by-step derivation
      1. mul-1-neg9.0%

        \[\leadsto \frac{\sin b}{\frac{\cos a}{r} + \color{blue}{\left(-\frac{\sin a \cdot b}{r}\right)}} \]
      2. unsub-neg9.0%

        \[\leadsto \frac{\sin b}{\color{blue}{\frac{\cos a}{r} - \frac{\sin a \cdot b}{r}}} \]
      3. associate-/l*8.5%

        \[\leadsto \frac{\sin b}{\frac{\cos a}{r} - \color{blue}{\frac{\sin a}{\frac{r}{b}}}} \]
    6. Simplified8.5%

      \[\leadsto \frac{\sin b}{\color{blue}{\frac{\cos a}{r} - \frac{\sin a}{\frac{r}{b}}}} \]
    7. Taylor expanded in a around 0 12.1%

      \[\leadsto \color{blue}{\sin b \cdot r} \]

    if -4.70000000000000018 < b

    1. Initial program 86.2%

      \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
    2. Step-by-step derivation
      1. +-commutative86.2%

        \[\leadsto r \cdot \frac{\sin b}{\cos \color{blue}{\left(b + a\right)}} \]
    3. Simplified86.2%

      \[\leadsto \color{blue}{r \cdot \frac{\sin b}{\cos \left(b + a\right)}} \]
    4. Taylor expanded in b around 0 72.9%

      \[\leadsto \color{blue}{\frac{b \cdot r}{\cos a}} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification58.2%

    \[\leadsto \begin{array}{l} \mathbf{if}\;b \leq -4.7:\\ \;\;\;\;r \cdot \sin b\\ \mathbf{else}:\\ \;\;\;\;\frac{r \cdot b}{\cos a}\\ \end{array} \]

Alternative 13: 39.8% accurate, 2.0× speedup?

\[r \cdot \sin b \]
Derivation
  1. Initial program 81.7%

    \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
  2. Step-by-step derivation
    1. *-commutative81.7%

      \[\leadsto \color{blue}{\frac{\sin b}{\cos \left(a + b\right)} \cdot r} \]
    2. associate-/r/81.5%

      \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos \left(a + b\right)}{r}}} \]
    3. +-commutative81.5%

      \[\leadsto \frac{\sin b}{\frac{\cos \color{blue}{\left(b + a\right)}}{r}} \]
  3. Simplified81.5%

    \[\leadsto \color{blue}{\frac{\sin b}{\frac{\cos \left(b + a\right)}{r}}} \]
  4. Taylor expanded in b around 0 58.1%

    \[\leadsto \frac{\sin b}{\color{blue}{\frac{\cos a}{r} + -1 \cdot \frac{\sin a \cdot b}{r}}} \]
  5. Step-by-step derivation
    1. mul-1-neg58.1%

      \[\leadsto \frac{\sin b}{\frac{\cos a}{r} + \color{blue}{\left(-\frac{\sin a \cdot b}{r}\right)}} \]
    2. unsub-neg58.1%

      \[\leadsto \frac{\sin b}{\color{blue}{\frac{\cos a}{r} - \frac{\sin a \cdot b}{r}}} \]
    3. associate-/l*58.0%

      \[\leadsto \frac{\sin b}{\frac{\cos a}{r} - \color{blue}{\frac{\sin a}{\frac{r}{b}}}} \]
  6. Simplified58.0%

    \[\leadsto \frac{\sin b}{\color{blue}{\frac{\cos a}{r} - \frac{\sin a}{\frac{r}{b}}}} \]
  7. Taylor expanded in a around 0 41.0%

    \[\leadsto \color{blue}{\sin b \cdot r} \]
  8. Final simplification41.0%

    \[\leadsto r \cdot \sin b \]

Alternative 14: 35.6% accurate, 69.0× speedup?

\[r \cdot b \]
Derivation
  1. Initial program 81.7%

    \[r \cdot \frac{\sin b}{\cos \left(a + b\right)} \]
  2. Step-by-step derivation
    1. +-commutative81.7%

      \[\leadsto r \cdot \frac{\sin b}{\cos \color{blue}{\left(b + a\right)}} \]
  3. Simplified81.7%

    \[\leadsto \color{blue}{r \cdot \frac{\sin b}{\cos \left(b + a\right)}} \]
  4. Taylor expanded in b around 0 56.2%

    \[\leadsto r \cdot \color{blue}{\frac{b}{\cos a}} \]
  5. Taylor expanded in a around 0 37.7%

    \[\leadsto r \cdot \color{blue}{b} \]
  6. Final simplification37.7%

    \[\leadsto r \cdot b \]

Reproduce

?
herbie shell --seed 2023167 
(FPCore (r a b)
  :name "rsin B (should all be same)"
  :precision binary64
  (* r (/ (sin b) (cos (+ a b)))))