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 r143140 = a;
        double r143141 = acos(r143140);
        double r143142 = -r143141;
        double r143143 = r143140 / r143142;
        return r143143;
}
↓
double f(double a) {
        double r143144 = a;
        double r143145 = acos(r143144);
        double r143146 = -r143145;
        double r143147 = r143144 / r143146;
        return r143147;
}

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 2020065 
(FPCore (a)
  :name "Fuzzer 001"
  :precision binary64
  (/ a (- (acos a))))