Average Error: 1.0 → 0.0
Time: 36.8s
Precision: 64
Internal Precision: 320
\[2 \cdot \cos \left(\frac{2 \cdot \pi}{3} + \frac{\cos^{-1} \left(\frac{-g}{h}\right)}{3}\right)\]
\[2 \cdot \log \left(\frac{e^{\cos \left(\frac{2}{3} \cdot \pi\right) \cdot \cos \left(\frac{\cos^{-1} \left(-\frac{g}{h}\right)}{3}\right)}}{e^{\sin \left((e^{\log_* (1 + \frac{2}{3} \cdot \pi)} - 1)^*\right) \cdot \sin \left(\frac{\cos^{-1} \left(-\frac{g}{h}\right)}{3}\right)}}\right)\]

Error

Bits error versus g

Bits error versus h

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 1.0

    \[2 \cdot \cos \left(\frac{2 \cdot \pi}{3} + \frac{\cos^{-1} \left(\frac{-g}{h}\right)}{3}\right)\]
  2. Using strategy rm
  3. Applied add-log-exp1.0

    \[\leadsto 2 \cdot \color{blue}{\log \left(e^{\cos \left(\frac{2 \cdot \pi}{3} + \frac{\cos^{-1} \left(\frac{-g}{h}\right)}{3}\right)}\right)}\]
  4. Applied simplify1.0

    \[\leadsto 2 \cdot \log \color{blue}{\left(e^{\cos \left((\left(\frac{2}{3}\right) \cdot \pi + \left(\frac{\cos^{-1} \left(-\frac{g}{h}\right)}{3}\right))_*\right)}\right)}\]
  5. Using strategy rm
  6. Applied fma-udef1.0

    \[\leadsto 2 \cdot \log \left(e^{\cos \color{blue}{\left(\frac{2}{3} \cdot \pi + \frac{\cos^{-1} \left(-\frac{g}{h}\right)}{3}\right)}}\right)\]
  7. Applied cos-sum1.0

    \[\leadsto 2 \cdot \log \left(e^{\color{blue}{\cos \left(\frac{2}{3} \cdot \pi\right) \cdot \cos \left(\frac{\cos^{-1} \left(-\frac{g}{h}\right)}{3}\right) - \sin \left(\frac{2}{3} \cdot \pi\right) \cdot \sin \left(\frac{\cos^{-1} \left(-\frac{g}{h}\right)}{3}\right)}}\right)\]
  8. Applied exp-diff1.0

    \[\leadsto 2 \cdot \log \color{blue}{\left(\frac{e^{\cos \left(\frac{2}{3} \cdot \pi\right) \cdot \cos \left(\frac{\cos^{-1} \left(-\frac{g}{h}\right)}{3}\right)}}{e^{\sin \left(\frac{2}{3} \cdot \pi\right) \cdot \sin \left(\frac{\cos^{-1} \left(-\frac{g}{h}\right)}{3}\right)}}\right)}\]
  9. Using strategy rm
  10. Applied expm1-log1p-u0.0

    \[\leadsto 2 \cdot \log \left(\frac{e^{\cos \left(\frac{2}{3} \cdot \pi\right) \cdot \cos \left(\frac{\cos^{-1} \left(-\frac{g}{h}\right)}{3}\right)}}{e^{\sin \color{blue}{\left((e^{\log_* (1 + \frac{2}{3} \cdot \pi)} - 1)^*\right)} \cdot \sin \left(\frac{\cos^{-1} \left(-\frac{g}{h}\right)}{3}\right)}}\right)\]

Runtime

Time bar (total: 36.8s)Debug logProfile

herbie shell --seed 2018206 +o rules:numerics
(FPCore (g h)
  :name "2-ancestry mixing, negative discriminant"
  (* 2 (cos (+ (/ (* 2 PI) 3) (/ (acos (/ (- g) h)) 3)))))