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

question 412

Multiple Choice

Write the complex number in trigonometric form $$r ( \cos \theta + i \sin \theta )$$ with θ in the interval [0°, 360°) .
- $- 12 - 16 i$

• A) \(20 \left( \cos 126.9 ^ { \circ } + i \sin 126.9 ^ { \circ } \right)\)
• B) \(20 \left( \cos 53.1 ^ { \circ } + i \sin 53.1 ^ { \circ } \right)\)
• C) \(20 \left( \cos 306.9 ^ { \circ } + i \sin 306.9 ^ { \circ } \right)\)
• D) \(20 \left( \cos 233.1 ^ { \circ } + i \sin 233.1 ^ { \circ } \right)\)

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Definitions:

Rollo May

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