Perform the Indicated Operation Using Trigonometric Form $$( - 6 - 6 i ) ( - 5 - 5 i )$$

Perform the indicated operation using trigonometric form.Leave answer in trigonometric form. $$( - 6 - 6 i ) ( - 5 - 5 i )$$

A) $30 \left( \cos \frac { \pi } { 8 } + i \sin \frac { \pi } { 8 } \right)$ ​
B) $- 60 \left( \cos \frac { \pi } { 8 } + i \sin \frac { \pi } { 8 } \right)$ ​
C) $30 \left( \cos \frac { \pi } { 2 } + i \sin \frac { \pi } { 2 } \right)$ ​
D) $60 \left( \cos \frac { \pi } { 2 } + i \sin \frac { \pi } { 2 } \right)$ ​
E) $- 30 \left( \cos \frac { \pi } { 8 } + i \sin \frac { \pi } { 8 } \right)$ ​

Correct Answer:

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