Average Error: 0.2 → 0.2
Time: 12.6s
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 r122241 = a;
        double r122242 = acos(r122241);
        double r122243 = -r122242;
        double r122244 = r122241 / r122243;
        return r122244;
}
↓
double f(double a) {
        double r122245 = a;
        double r122246 = acos(r122245);
        double r122247 = -r122246;
        double r122248 = r122245 / r122247;
        return r122248;
}

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 2020047 
(FPCore (a)
  :name "Fuzzer 001"
  :precision binary64
  (/ a (- (acos a))))