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NAME
asin, asinf, asinl - arc sine function
SYNOPSIS
#include <math.h>
double asin(double x );
float asinf(float x );
long double asinl(long double x );
Link with -lm.
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
SVr4, POSIX.1-2001, 4.3BSD, C89, C99. The float and
long double variants are C99 requirements.
SEE ALSO
acos (3) casin (3)
atan (3) atan2 (3) cos (3) sin (3) tan
(3)
