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);
Note
Link with −lm.
DESCRIPTION
The casinh() function
calculates 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.
CONFORMING TO
C99.
SEE ALSO
asinh(3), cabs(3), cimag(3), complex(7)
COLOPHON
This page is part of release 3.22 of the Linux man-pages project. A
description of the project, and information about reporting
bugs, can be found at
http://www.kernel.org/doc/man-pages/.
Copyright 2002 Walter Harms (walter.harmsinformatik.uni-oldenburg.de)
Distributed under GPL