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); |
![[Note]](../stylesheet/note.png) |
Note |
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Link with |
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)