Write the complex number in trigonometric form r(cos ? + i sin ?), with ? in the interval [0°, 360°).-15 - 20i
A. 25(cos 53.1° + i sin 53.1°)
B. 25(cos 306.9° + i sin 306.9°)
C. 25(cos 126.9° + i sin 126.9°)
D. 25(cos 233.1° + i sin 233.1°)
Answer: D
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