Average Error: 0.3 → 0.3
Time: 3.4m
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 r21661256 = a;
        double r21661257 = acos(r21661256);
        double r21661258 = -r21661257;
        double r21661259 = r21661256 / r21661258;
        return r21661259;
}
↓
double f(double a) {
        double r21661260 = a;
        double r21661261 = acos(r21661260);
        double r21661262 = -r21661261;
        double r21661263 = r21661260 / r21661262;
        return r21661263;
}

Error

Bits error versus a

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Results

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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 2019125 
(FPCore (a)
  :name "Fuzzer 001"
  (/ a (- (acos a))))