Perform the Indicated Operation Using Trigonometric Form $( 3 + 3 i ) ( 5 + 5 i )$

Multiple Choice

Perform the indicated operation using trigonometric form. Leave answer in trigonometric form.
$( 3 + 3 i ) ( 5 + 5 i )$

A) $- 15 \left( \cos \frac { 5 \pi } { 4 } + i \sin \frac { 5 \pi } { 4 } \right)$
B) $- 30 \left( \cos \frac { 3 \pi } { 2 } + i \sin \frac { 3 \pi } { 2 } \right)$
C) $15 \left( \cos \frac { \pi } { 2 } + i \sin \frac { \pi } { 2 } \right)$
D) $30 \left( \cos \frac { \pi } { 2 } + i \sin \frac { \pi } { 2 } \right)$
E) $15 \left( \cos \frac { 3 \pi } { 4 } + i \sin \frac { 3 \pi } { 4 } \right)$