Average Error: 0.2 → 0.2
Time: 3.6s
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 r145885 = a;
        double r145886 = acos(r145885);
        double r145887 = -r145886;
        double r145888 = r145885 / r145887;
        return r145888;
}
↓
double f(double a) {
        double r145889 = a;
        double r145890 = acos(r145889);
        double r145891 = -r145890;
        double r145892 = r145889 / r145891;
        return r145892;
}

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 2019352 
(FPCore (a)
  :name "Fuzzer 001"
  :precision binary64
  (/ a (- (acos a))))