ASIN(3) Linux Programmer's Manual ASIN(3)
asin, asinf, asinl - arc sine function
double asin(double x);
float asinf(float x);
long double asinl(long double x);
Link with -lm.
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.
The asin() function returns the arc sine in radians and the value is
mathematically defined to be between -PI/2 and PI/2 (inclusive).
EDOM x is out of range.
SVr4, POSIX.1-2001, 4.3BSD, C89, C99. The float and long double vari-
ants are C99 requirements.
acos(3), atan(3), atan2(3), casin(3), cos(3), sin(3), tan(3)
This page is part of release 3.05 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.