.\" $NetBSD: cacos.3,v 1.3 2013/01/29 02:05:08 matt Exp $
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
.Dd December 2, 2014
.Dt CACOSL 3
.Os
.Sh NAME
.Nm cacosl
.Nd complex arc cosine function
.Sh LIBRARY
.Lb libm
.Sh SYNOPSIS
.In complex.h
.Ft long double complex
.Fn cacosl "long double complex z"
.Sh DESCRIPTION
This function computes the complex arc cosine of
.Ar z ,
with branch cuts outside the interval [\-1,\ +1] along the
real axis.
.Sh RETURN VALUES
This function returns the complex arc cosine value, in the
range of a strip mathematically unbounded along the imaginary
axis and in the interval [0,\ pi] along the real axis.
.Sh ERRORS
No errors are defined.
.Sh SEE ALSO
.Xr ccos 3 ,
.St -p1003.1-2001
.Aq Pa complex.h
.Sh COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document.
The original Standard can be obtained online at
http://www.opengroup.org/unix/online.html .