\cos^{-1} \left(\frac{1 - 5 \cdot \left(v \cdot v\right)}{v \cdot v - 1}\right)\left(\sqrt{\sqrt[3]{\cos^{-1} \left(\frac{1 - \left(v \cdot 5\right) \cdot v}{{v}^{2} - 1}\right)}} \cdot \sqrt{\sqrt[3]{\cos^{-1} \left(\frac{1 - \left(v \cdot 5\right) \cdot v}{{v}^{2} - 1}\right)}}\right) \cdot \left(\sqrt[3]{\cos^{-1} \left(\frac{1 - \left(v \cdot v\right) \cdot 5}{v \cdot v - 1}\right)} \cdot \left(\sqrt{\sqrt[3]{\cos^{-1} \left(\frac{1 - \left(v \cdot v\right) \cdot 5}{{v}^{2} - 1}\right)}} \cdot \sqrt{\sqrt[3]{\cos^{-1} \left(\frac{1 - \left(v \cdot v\right) \cdot 5}{{v}^{2} - 1}\right)}}\right)\right)double f(double v) {
double r128388 = 1.0;
double r128389 = 5.0;
double r128390 = v;
double r128391 = r128390 * r128390;
double r128392 = r128389 * r128391;
double r128393 = r128388 - r128392;
double r128394 = r128391 - r128388;
double r128395 = r128393 / r128394;
double r128396 = acos(r128395);
return r128396;
}
double f(double v) {
double r128397 = 1.0;
double r128398 = v;
double r128399 = 5.0;
double r128400 = r128398 * r128399;
double r128401 = r128400 * r128398;
double r128402 = r128397 - r128401;
double r128403 = 2.0;
double r128404 = pow(r128398, r128403);
double r128405 = r128404 - r128397;
double r128406 = r128402 / r128405;
double r128407 = acos(r128406);
double r128408 = cbrt(r128407);
double r128409 = sqrt(r128408);
double r128410 = r128409 * r128409;
double r128411 = r128398 * r128398;
double r128412 = r128411 * r128399;
double r128413 = r128397 - r128412;
double r128414 = r128411 - r128397;
double r128415 = r128413 / r128414;
double r128416 = acos(r128415);
double r128417 = cbrt(r128416);
double r128418 = r128413 / r128405;
double r128419 = acos(r128418);
double r128420 = cbrt(r128419);
double r128421 = sqrt(r128420);
double r128422 = r128421 * r128421;
double r128423 = r128417 * r128422;
double r128424 = r128410 * r128423;
return r128424;
}



Bits error versus v
Results
Initial program 0.5
Simplified0.5
rmApplied add-cube-cbrt2.0
Simplified2.0
Simplified2.0
rmApplied add-sqr-sqrt1.5
Simplified1.5
Simplified1.5
rmApplied add-sqr-sqrt0.5
Simplified0.5
Simplified0.5
Final simplification0.5
herbie shell --seed 2019196
(FPCore (v)
:name "Falkner and Boettcher, Appendix B, 1"
(acos (/ (- 1.0 (* 5.0 (* v v))) (- (* v v) 1.0))))