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2015-04-19
Aliases: casinhf(3), casinhf(3), casinhf(3), casinhf(3), casinhf(3), casinhf(3), casinhl(3), casinhl(3), casinhl(3), casinhl(3), casinhl(3), casinhl(3)

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NAME

casinh, casinhf, casinhl - complex arc sine hyperbolic

SYNOPSIS

#include <complex.h>
double complex casinh(double complex z);
float complex casinhf(float complex z);
long double complex casinhl(long double complex z);
Link with -lm.

DESCRIPTION

These functions calculate the complex arc hyperbolic sine of z. If y = casinh(z), then z = csinh(y). The imaginary part of y is chosen in the interval [-pi/2,pi/2].
One has:
    casinh(z) = clog(z + csqrt(z * z + 1))

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/.
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