ASIN

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
SEE ALSO

NAME

asin − arc sine function

SYNOPSIS

#include <math.h>

double asin(double x);

DESCRIPTION

The asin() function calculates the arc sine of x; that is the value whose sine is x. If x falls outside the range −1 to 1, asin() fails and errno is set.

RETURN VALUE

The asin() function returns the arc sine in radians and the value is mathematically defined to be between -PI/2 and PI/2 (inclusive).

ERRORS

EDOM

x is out of range.

CONFORMING TO

SVID 3, POSIX, BSD 4.3, ISO 9899

SEE ALSO

acos(3), atan(3), atan2(3), cos(3), sin(3), tan(3)