Scroll to navigation

CASIN(3) Linux Programmer's Manual CASIN(3)

NAME

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

The casin() function calculates 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.

CONFORMING TO

C99.

SEE ALSO

clog(3), csin(3), complex(7)

COLOPHON

This page is part of release 3.74 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.
2008-08-11