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 r99686 = a;
        double r99687 = acos(r99686);
        double r99688 = -r99687;
        double r99689 = r99686 / r99688;
        return r99689;
}
↓
double f(double a) {
        double r99690 = a;
        double r99691 = acos(r99690);
        double r99692 = -r99691;
        double r99693 = r99690 / r99692;
        return r99693;
}

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 2020083 
(FPCore (a)
  :name "Fuzzer 001"
  :precision binary64
  (/ a (- (acos a))))