2 .\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
3 .TH "CACOS" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
6 cacos, cacosf \- complex arc cosine functions
9 \fB#include <complex.h>
12 double complex cacos(double complex\fP \fIz\fP\fB);
14 float complex cacosf(float complex\fP \fIz\fP\fB);
19 These functions compute the complex arc cosine of \fIz\fP, with
20 branch cuts outside the interval [-1,\ +1] along the
24 These functions return the complex arc cosine value, in the
25 range of a strip mathematically unbounded along the imaginary
26 axis and in the interval [0,\ pi] along the real axis.
29 No errors are defined.
31 \fIThe following sections are informative.\fP
46 \fIccos\fP(), the Base Definitions volume of IEEE\ Std\ 1003.1-2001,
49 Portions of this text are reprinted and reproduced in electronic form
50 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
51 -- Portable Operating System Interface (POSIX), The Open Group Base
52 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
53 Electrical and Electronics Engineers, Inc and The Open Group. In the
54 event of any discrepancy between this version and the original IEEE and
55 The Open Group Standard, the original IEEE and The Open Group Standard
56 is the referee document. The original Standard can be obtained online at
57 http://www.opengroup.org/unix/online.html .