Average Error: 0.2 → 0.2
Time: 2.9s
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 r136783 = a;
        double r136784 = acos(r136783);
        double r136785 = -r136784;
        double r136786 = r136783 / r136785;
        return r136786;
}
↓
double f(double a) {
        double r136787 = a;
        double r136788 = acos(r136787);
        double r136789 = -r136788;
        double r136790 = r136787 / r136789;
        return r136790;
}

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 2020060 
(FPCore (a)
  :name "Fuzzer 001"
  :precision binary64
  (/ a (- (acos a))))