CACOS(3) Linux Programmers Manual CACOS(3)
NAME
cacos, cacosf, cacosl  complex arc cosine
SYNOPSIS
#include
double complex cacos(double complex z);
float complex cacosf(float complex z);
long double complex cacosl(long double complex z);
Link with lm.
DESCRIPTION
The cacos() function calculates the complex arc cosine of z. If
y = cacos(z), then z = ccos(y). The real part of y is chosen in the
interval [0,pi].
One has:
cacos(z) = i clog(z + csqrt(z * z  1))
CONFORMING TO
C99.
SEE ALSO
ccos(3), clog(3), complex(7)
COLOPHON
This page is part of release 3.05 of the Linux manpages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/manpages/.
20071226 CACOS(3)
