CASINH(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);

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), csinh(3), complex(7)

COLOPHON
This page is part of release 3.50 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/.