Function acos

src/fl/math/math.h:379–379

// acos
inline float acosf(float value) FL_NOEXCEPT { return acos_impl_float(value); }
inline double acos(double value) FL_NOEXCEPT { return acos_impl_double(value); }
template<typename T> inline typename enable_if<is_integral<T>::value, float>::type
acos(T value) FL_NOEXCEPT { return acos_impl_float(static_cast<float>(value)); }