cacos(3)
NAME
cacos, cacosf, cacosl - complex arc cosine
SYNOPSIS
#include <complex.h> 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))
VERSIONS
These functions first appeared in glibc in version 2.1.
CONFORMING TO
C99.
SEE ALSO
COLOPHON
- This page is part of release 3.25 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/.