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2015-04-19
Aliases: casinf(3), casinf(3), casinf(3), casinf(3), casinf(3), casinf(3), casinl(3), casinl(3), casinl(3), casinl(3), casinl(3), casinl(3)

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Manual pages about using GNU/Linux for development

man-pages

Linux kernel and C library user-space interface documentation

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

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
Thread safety MT-Safe

CONFORMING TO

C99, POSIX.1-2001, POSIX.1-2008.

COLOPHON

This page is part of release 5.00 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 https://www.kernel.org/doc/man-pages/.

REFERENCED BY

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