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OpenStudy (anonymous):
Please help----ill fan & medal!!!! Find all four of the fourth roots of 81[cos(3π/8) + i sin(3π/8)]. Express your answers in polar (r(cos theta + i sin theta)) form.
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OpenStudy (anonymous):
Are they 3pi/32, 19pi/32, 51pi/32 and 13 pi/32?
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