Average Error: 0.3 → 0.3
Time: 2.4s
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 r118986 = a;
        double r118987 = acos(r118986);
        double r118988 = -r118987;
        double r118989 = r118986 / r118988;
        return r118989;
}
↓
double f(double a) {
        double r118990 = a;
        double r118991 = acos(r118990);
        double r118992 = -r118991;
        double r118993 = r118990 / r118992;
        return r118993;
}

Error

Bits error versus a

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.3

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

  2. Final simplification0.3

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

Reproduce

herbie shell --seed 2020024 
(FPCore (a)
  :name "Fuzzer 001"
  :precision binary64
  (/ a (- (acos a))))