Average Error: 0 → 0
Time: 950.0ms
Precision: binary64
\[\cos \left(\frac{x}{2}\right)\]
↓
\[\cos \left(\frac{x}{2}\right)\]
\cos \left(\frac{x}{2}\right)
↓
\cos \left(\frac{x}{2}\right)
double code(double x) {
	return ((double) cos(((double) (x / 2.0))));
}
↓
double code(double x) {
	return ((double) cos(((double) (x / 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 0

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

  2. Final simplification0

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

Reproduce

herbie shell --seed 2020153 
(FPCore (x)
  :name "(cos (/ x 2))"
  :precision binary64
  (cos (/ x 2.0)))