Computes the complex arc sine.
#include <complex.h> double complex casin (z) double complex z; float complex casinf (z) float complex z; long double complex casinl (z) long double complex z;
The casin, casinf, or casinl subroutine computes the complex arc sine of the z parameter, with branch cuts outside the interval [-1, +1] along the real axis.
| z | Specifies the value to be computed. |
The casin, casinf, or casinl subroutine returns the complex arc sine value, in the range of a strip mathematically unbounded along the imaginary axis and in the interval [-pi/2, +pi/2] along the real axis.
The csin, csinf, or csinl Subroutine.