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.
| Item | Description |
|---|---|
| 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.