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.
cacos, cacosf, cacosl - complex arc cosine functions
double complex cacos(double complex z);
float complex cacosf(float complex z);
long double complex cacosl(long double complex z);
These functions shall compute the complex arc cosine of z, with branch
cuts outside the interval [-1, +1] along the real axis.
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.
No errors are defined.
The following sections are informative.
SEE ALSOccos(), the Base Definitions volume of IEEE Std 1003.1-2001, <com‐
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)