Write the complex number in polar form. Express the argument ? in degrees, with 0 ? ? ? 360°.7 + 7i
A. 7
(cos 135° + i sin 135°)
B. 7
(cos 225° + i sin 225°)
C. 7
(cos 315° + i sin 315°)
D. 7
(cos 45° + i sin 45°)
Answer: D
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