C4. Elementary functions (transcendental functions)

Functions
function	cos_pi (x::Real)
	cos(πx)
function	powm1 (x::Real, y::Real)
	x^y - 1
function	sin_pi (x::Real)
	sin(πx)
function	sqrt1pm1 (x::Real)
	sqrt(1 + x) - 1

Detailed Description

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