casinh(3) — Linux manual pages

Linux manual pages	Section 3

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);

	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.

COLOPHON

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