Find the Trigonometric Form Of $- 9 + 9 i$
A)

question 20

Multiple Choice

Find the trigonometric form of $- 9 + 9 i$ .

• A) \(9 \left( \cos \frac { 3 \pi } { 4 } + i \sin \frac { 3 \pi } { 4 } \right)\)
• B) \(\frac { 9 } { 2 } \left( \cos \frac { 3 \pi } { 2 } + i \sin \frac { 3 \pi } { 2 } \right)\)
• C) \(9 \sqrt { 2 } \left( \cos \frac { 3 \pi } { 2 } + i \sin \frac { 3 \pi } { 2 } \right)\)
• D) \(9 \sqrt { 2 } \left( \cos \frac { 3 \pi } { 4 } + i \sin \frac { 3 \pi } { 4 } \right)\)
• E) \(\frac { 9 } { 2 } \left( \cos \frac { 3 \pi } { 8 } + i \sin \frac { 3 \pi } { 8 } \right)\)

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