Average Error: 0.3 → 0.3
Time: 2.1s
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 r120384 = a;
        double r120385 = acos(r120384);
        double r120386 = -r120385;
        double r120387 = r120384 / r120386;
        return r120387;
}
↓
double f(double a) {
        double r120388 = a;
        double r120389 = acos(r120388);
        double r120390 = -r120389;
        double r120391 = r120388 / r120390;
        return r120391;
}

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 2019362 
(FPCore (a)
  :name "Fuzzer 001"
  :precision binary64
  (/ a (- (acos a))))