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3 July, 16:56

Find the fourth roots of 16 (cos 200° + i sin 200°).

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  1. 3 July, 17:23
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    y=2 (cos (50=90n) = isin (50+90n))

    take n=0, y=2 (cos (50) + isin (50))

    take n=1, y=2 (cos (140) + isin (140))

    take n=2, y=2 (cos (230) + isin (230))

    take n=3, y=2 (cos (320) + isin (320))
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