Average Error: 0.2 → 0.2
Time: 7.8s
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 r68258 = a;
        double r68259 = acos(r68258);
        double r68260 = -r68259;
        double r68261 = r68258 / r68260;
        return r68261;
}
↓
double f(double a) {
        double r68262 = a;
        double r68263 = acos(r68262);
        double r68264 = -r68263;
        double r68265 = r68262 / r68264;
        return r68265;
}

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 2019308 
(FPCore (a)
  :name "Fuzzer 001"
  :precision binary64
  (/ a (- (acos a))))