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-.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
-.\"
-.\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
-.\" Distributed under GPL
-.\" %%%LICENSE_END
-.\"
-.TH CARG 3 2008-08-11 "" "Linux Programmer's Manual"
-.SH NAME
-carg, cargf, cargl \- calculate the complex argument
-.SH SYNOPSIS
-.B #include <complex.h>
-.sp
-.BI "double carg(double complex " z ");"
-.br
-.BI "float cargf(float complex " z ");"
-.br
-.BI "long double cargl(long double complex " z ");"
-.sp
-Link with \fI\-lm\fP.
-.SH DESCRIPTION
-A complex number can be described by two real coordinates.
-One may use rectangular coordinates and gets
-
-.nf
-    z = x + I * y
-.fi
-
-where
-.IR "x\ =\ creal(z)"
-and
-.IR "y\ =\ cimag(z)" .
-.LP
-Or one may use polar coordinates and gets
-.nf
-
-    z = r * cexp(I * a)
-
-.fi
-where
-.IR "r\ =\ cabs(z)"
-is the "radius", the "modulus", the absolute value of
-.IR z ,
-and
-.IR "a\ =\ carg(z)"
-is the "phase angle", the argument of
-.IR z .
-.LP
-One has:
-.nf
-
-    tan(carg(z)) = cimag(z) / creal(z)
-.fi
-.SH RETURN VALUE
-The return value is the range of [\-pi,pi].
-.SH VERSIONS
-These functions first appeared in glibc in version 2.1.
-.SH CONFORMING TO
-C99.
-.SH SEE ALSO
-.BR cabs (3),
-.BR complex (7)
-.SH COLOPHON
-This page is part of release 3.79 of the Linux
-.I man-pages
-project.
-A description of the project,
-information about reporting bugs,
-and the latest version of this page,
-can be found at
-\%http://www.kernel.org/doc/man\-pages/.