Find the Trigonometric Form Of $- 5 + 5 \sqrt { 3 } i$

Find the trigonometric form of $- 5 + 5 \sqrt { 3 } i$ . ​

A) $5 \sqrt { 2 } \left( \cos \frac { 2 \pi } { 3 } + i \sin \frac { 2 \pi } { 3 } \right)$
B) ​ $5 \left( \cos \frac { \pi } { 3 } + i \sin \frac { \pi } { 3 } \right)$
C) ​ $$5 \left( \cos \frac { 2 \pi } { 3 } + i \sin \frac { 2 \pi } { 3 } \right)$$
D) ​ $$10 \left( \cos \frac { \pi } { 3 } + i \sin \frac { \pi } { 3 } \right)$$
E) ​ $10 \left( \cos \frac { 2 \pi } { 3 } + i \sin \frac { 2 \pi } { 3 } \right)$

Correct Answer:

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