Average Error: 0.3 → 0.3
Time: 3.3s
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 r128337 = a;
        double r128338 = acos(r128337);
        double r128339 = -r128338;
        double r128340 = r128337 / r128339;
        return r128340;
}
↓
double f(double a) {
        double r128341 = a;
        double r128342 = acos(r128341);
        double r128343 = -r128342;
        double r128344 = r128341 / r128343;
        return r128344;
}

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 2020100 
(FPCore (a)
  :name "Fuzzer 001"
  :precision binary64
  (/ a (- (acos a))))