The complex numbers are
and
.
Product of
and
:

.
Express complex numbers in polar form.
\Polar form of complex numbers is
.
Consider
.
.
Find
.
If
, then
.


.
Polar form of
is
.
Consider
.
.
Find
.
If
, then
.

.
Polar form of
is
.
Product of
and
.
Product formula of complex numbers in polar form:
\
and 
.
.
.
.