Computes the arc sine.
#include <math.h> float asinf (x) float x; long double asinl (x) long double x; double asin (x) double x;
The asinf, asinl, and asin subroutines compute the principal value of the arc sine of the x parameter. The value of x should be in the range [-1,1].
An application wishing to check for error situations should set the errno global variable to zero and call feclearexcept(FE_ALL_EXCEPT) before calling these subroutines. On return, if errno is nonzero or fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is nonzero, an error has occurred.
| x | Specifies the value to be computed. |
Upon successful completion, the asinf, asinl, and asin subroutines return the arc sine of x, in the range [-pi /2, pi/2] radians.
For finite values of x not in the range [-1,1], a domain error occurs, and a NaN is returned.
If x is NaN, a NaN is returned.
If x is 0, x is returned.
If x is ±Inf, a domain error occurs, and a NaN is returned.
If x is subnormal, a range error may occur and x is returned.
The asinh, asinhf, or asinhl Subroutine.
math.h in AIX 5L Version 5.2 Files Reference.
Subroutines Overview in AIX 5L Version 5.2 General Programming Concepts: Writing and Debugging Programs.