php man page for cacosh

Query: cacosh

OS: php

Section: 3

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

CACOSH(3)						     Linux Programmer's Manual							 CACOSH(3)

NAME
cacosh, cacoshf, cacoshl - complex arc hyperbolic cosine
SYNOPSIS
#include <complex.h> double complex cacosh(double complex z); float complex cacoshf(float complex z); long double complex cacoshl(long double complex z); Link with -lm.
DESCRIPTION
These functions calculate the complex arc hyperbolic cosine of z. If y = cacosh(z), then z = ccosh(y). The imaginary part of y is chosen in the interval [-pi,pi]. The real part of y is chosen nonnegative. One has: cacosh(z) = 2 * clog(csqrt((z + 1) / 2) + csqrt((z - 1) / 2))
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 | +-------------------------------+---------------+---------+ |cacosh(), cacoshf(), cacoshl() | Thread safety | MT-Safe | +-------------------------------+---------------+---------+
CONFORMING TO
C99, POSIX.1-2001, POSIX.1-2008.
EXAMPLE
/* Link with "-lm" */ #include <complex.h> #include <stdlib.h> #include <unistd.h> #include <stdio.h> int main(int argc, char *argv[]) { double complex z, c, f; if (argc != 3) { fprintf(stderr, "Usage: %s <real> <imag> ", argv[0]); exit(EXIT_FAILURE); } z = atof(argv[1]) + atof(argv[2]) * I; c = cacosh(z); printf("cacosh() = %6.3f %6.3f*i ", creal(c), cimag(c)); f = 2 * clog(csqrt((z + 1)/2) + csqrt((z - 1)/2)); printf("formula = %6.3f %6.3f*i ", creal(f2), cimag(f2)); exit(EXIT_SUCCESS); }
SEE ALSO
acosh(3), cabs(3), ccosh(3), cimag(3), complex(7)
COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. 2015-04-19 CACOSH(3)
Related Man Pages
cacos(3) - redhat
cacos(3) - php
cacosh(3) - php
cacos(3) - plan9
cacosh(3) - plan9
Similar Topics in the Unix Linux Community
UNIX.COM 2017 Year End Summary
New Code Tags (Syntax Highlighting)
Please Welcome Don Cragun as Lead Moderator
Please Welcome Ravinder Singh to the Moderation Team
The Order of the Wizard's Hat - Lifetime Achievement Award 2019 - Congrats to Don Cragun