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

question 143

Multiple Choice

Write the complex number in trigonometric form $$r ( \cos \theta + i \sin \theta )$$ with θ in the interval [0°, 360°) .
- $- 6 - 6 \mathrm { i } \sqrt { 3 }$

• A) \(12 \left( \cos 290 ^ { \circ } + i \sin 290 ^ { \circ } \right)\)
• B) \(6 \left( \cos 240 ^ { \circ } + i \sin 240 ^ { \circ } \right)\)
• C) \(12 \left( \cos 180 ^ { \circ } + i \sin 180 ^ { \circ } \right)\)
• D) \(12 \left( \cos 240 ^ { \circ } + i \sin 240 ^ { \circ } \right)\)

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