Average Error: 15.1 → 15.1
Time: 1.5s
Precision: binary64
\[\cos x - 1\]
↓
\[\cos x - 1\]
\cos x - 1
↓
\cos x - 1
double code(double x) {
	return ((double) (((double) cos(x)) - 1.0));
}
↓
double code(double x) {
	return ((double) (((double) cos(x)) - 1.0));
}

Error

Bits error versus x

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 15.1

    \[\cos x - 1\]

  2. Final simplification15.1

    \[\leadsto \cos x - 1\]

Reproduce

herbie shell --seed 2020153 
(FPCore (x)
  :name "(- (cos x) 1)"
  :precision binary64
  (- (cos x) 1.0))