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asin(3) -- Linux man page
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);
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.
The float and long double variants are C99 requirements.
SEE ALSO
acos(3),
atan(3),
atan2(3),
cos(3),
sin(3),
tan(3)
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