casinh(3)

NAME
casinh, casinhf, casinhl - complex arc sine hyperbolic

LIBRARY
Math library (libm, -lm)

SYNOPSIS
#include <complex.h>

double complex casinh(double complex z);
float complex casinhf(float complex z);
long double complex casinhl(long double complex z);

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))

ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
Interface | Attribute | Value
 | Thread safety | MT-Safe

STANDARDS
C11, POSIX.1-2008.

HISTORY
glibc 2.1. C99, POSIX.1-2001.

SEE ALSO
asinh(3), cabs(3), cimag(3), csinh(3), complex(7)