acos.c File Reference

#include "../math.h"

Functions
double	acos (double x)
	Compute arc cosine. More...

Function Documentation

acos()

double acos

(

double

x

)

Compute arc cosine.

The acos functions compute the principal value of the arc cosine of x. A domain error occurs for arguments not in the interval [−1, +1].

Parameters

x	Value whose arc cosine is computed, in the interval [-1,+1].

Returns

The acos functions return arccos x in the interval [0,π ] radians.