catanhf (3) - Linux Manuals
catanhf: complex arc tangents hyperbolic
NAME
catanh, catanhf, catanhl - complex arc tangents hyperbolic
SYNOPSIS
#include <complex.h>
double complex catanh(double complex z);
float complex catanhf(float complex z);
long double complex catanhl(long double complex z);
DESCRIPTION
These functions calculate the complex arc hyperbolic tangent of z. If y = catanh(z), then z = ctanh(y). The imaginary part of y is chosen in the interval [-pi/2,pi/2].One has:
catanh(z) = 0.5 * (clog(1 + z) - clog(1 - z))
VERSIONS
These functions first appeared in glibc in version 2.1.ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).Interface | Attribute | Value |
catanh(), catanhf(), catanhl() | Thread safety | MT-Safe |
CONFORMING TO
C99, POSIX.1-2001, POSIX.1-2008.EXAMPLES
/* Link with "-lm" */#include <complex.h> #include <stdlib.h> #include <unistd.h> #include <stdio.h>
int
main(int argc, char *argv[])
{
COLOPHON
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