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Mathematics 11 Online
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))

OpenStudy (maddiep5):

It was A

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