Average Error: 0.2 → 0.2
Time: 3.4s
Precision: 64
\[\frac{a}{-\cos^{-1} a}\]
↓
\[\frac{a}{-\cos^{-1} a}\]
\frac{a}{-\cos^{-1} a}
↓
\frac{a}{-\cos^{-1} a}
double f(double a) {
        double r162187 = a;
        double r162188 = acos(r162187);
        double r162189 = -r162188;
        double r162190 = r162187 / r162189;
        return r162190;
}
↓
double f(double a) {
        double r162191 = a;
        double r162192 = acos(r162191);
        double r162193 = -r162192;
        double r162194 = r162191 / r162193;
        return r162194;
}

Error

Bits error versus a

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.2

    \[\frac{a}{-\cos^{-1} a}\]

  2. Final simplification0.2

    \[\leadsto \frac{a}{-\cos^{-1} a}\]

Reproduce

herbie shell --seed 2019353 
(FPCore (a)
  :name "Fuzzer 001"
  :precision binary64
  (/ a (- (acos a))))