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 3.53 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/.