7.12.4.2 The asin functions

Synopsis

1

#include <math.h>
double asin(double x);
float asinf(float x);
long double asinl(long double x);

Description

2

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

Returns

3

The asin functions return arcsin x in the interval [-pi /2, +pi /2] radians.