Write the Complex Number in Trigonometric Form $$r ( \cos \theta + i \sin \theta )$$

question 264

Multiple Choice

Write the complex number in trigonometric form $$r ( \cos \theta + i \sin \theta )$$ with θ in the interval [0°, 360°) .
- $5 - 5 \sqrt { 3 } i$

• A) \(10 \left( \cos 150 ^ { \circ } + i \sin 150 ^ { \circ } \right)\)
• B) \(10 \left( \cos 300 ^ { \circ } + i \sin 300 ^ { \circ } \right)\)
• C) \(5 \left( \cos 330 ^ { \circ } + \sin i 330 ^ { \circ } \right)\)
• D) \(5 \left( \cos 330 ^ { \circ } + i \sin 330 ^ { \circ } \right)\)

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