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OpenStudy (maddiep5):
Use De Moivre's theorem to write the complex number in trigonometric form. (cos (4pi/7) + i sin (4pi/7)) ^5 A. ( cos (20pi/7) + i sin (20pi/7)) B. 5 ( cos (4pi/7) + i sin (4pi/7)) C. ( cos (4pi/35) + i sin (4pi/35)) D. 5 ( cos (20pi/7) + i sin (20pi/7))
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OpenStudy (maddiep5):
It was A
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