cargf man page on YellowDog

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CARG(3)			     complex math routines		       CARG(3)

NAME
       carg, cargf, cargl - calculate the argument

SYNOPSIS
       #include <complex.h>

       double carg(double complex z);
       float cargf(float complex z);
       long double cargl(long double complex z);

       Link with -lm.

DESCRIPTION
       A complex number can be described by two real coordinates.  One may use
       rectangular coordinates and gets z = x+I*y, where x = creal(z) and y  =
       cimag(z).

       Or  one	may  use  polar coordinates and gets z = r*cexp(I*a) where r =
       cabs(z) is the "radius", the "modulus", the absolute value of z, and  a
       = carg(z) is the "phase angle", the argument of z.

       One has tan(carg(z)) = cimag(z) / creal(z).

RETURN VALUE
       The return value is the range of [-pi,pi].

CONFORMING TO
       C99

SEE ALSO
       cabs(3), complex(7)

				  2002-07-28			       CARG(3)
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