casinf (3) Linux Manual Page
casin, casinf, casinl – complex arc sine
Synopsis
#include <complex.h> double complex casin(double complex z);
float complex casinf(float complex z);
long double complex casinl(long double complex z);
Link with -lm.
Description
These functions calculate the complex arc sine of z. If y = casin(z), then z = csin(y). The real part of y is chosen in the interval [-pi/2,pi/2].One has:
casin(z) = -i clog(iz + csqrt(1 – z * z))
Versions
These functions first appeared in glibc in version 2.1.Attributes
For an explanation of the terms used in this section, see attributes(7).| Interface | Attribute | Value |
| casin(), casinf(), casinl() | Thread safety | MT-Safe |