C4. Elementary functions (transcendental functions)

Functions
double	_cos_pi (double x)
	cos(πx)
double	_powm1 (double x, double y)
	x^y - 1
double	_sin_pi (double x)
	sin(πx)
double	_sqrt1pm1 (double x)
	sqrt(1 + x) - 1

Detailed Description

This is the group of C4. Elementary function (transcendental function) routines.