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CACOS(3P)                  POSIX Programmer's Manual                 CACOS(3P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the  corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.
NAME
       cacos, cacosf, cacosl - complex arc cosine functions
SYNOPSIS
       #include <complex.h>
       double complex cacos(double complex z);
       float complex cacosf(float complex z);
       long double complex cacosl(long double complex z);

DESCRIPTION
       These functions shall compute the complex arc cosine of z, with  branch
       cuts outside the interval [-1, +1] along the real axis.
RETURN VALUE
       These functions shall return 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.
ERRORS
       No errors are defined.
       The following sections are informative.
EXAMPLES
       None.
APPLICATION USAGE
       None.
RATIONALE
       None.
FUTURE DIRECTIONS
       None.
SEE ALSO
       ccos(),  the  Base  Definitions  volume  of IEEE Std 1003.1-2001, <com-
       plex.h>
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 .

IEEE/The Open Group                  2003                            CACOS(3P)