Average Error: 57.7 → 57.7
Time: 2.2s
Precision: binary64
\[\cos \left(x - \frac{\pi}{2}\right)\]
↓
\[\cos \left(x - \frac{\pi}{2}\right)\]
\cos \left(x - \frac{\pi}{2}\right)
↓
\cos \left(x - \frac{\pi}{2}\right)
double code(double x) {
	return ((double) cos(((double) (x - ((double) (((double) M_PI) / 2.0))))));
}
↓
double code(double x) {
	return ((double) cos(((double) (x - ((double) (((double) M_PI) / 2.0))))));
}

Error

Bits error versus x

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 57.7

    \[\cos \left(x - \frac{\pi}{2}\right)\]

  2. Final simplification57.7

    \[\leadsto \cos \left(x - \frac{\pi}{2}\right)\]

Reproduce

herbie shell --seed 2020152 
(FPCore (x)
  :name "(cos (- x (/ PI 2)))"
  :precision binary64
  (cos (- x (/ PI 2.0))))