Use de moivres theorem to
1.derive the 4th roots of w=-8i.
2.express cos(4@) and sin(5@) in terms of powers of cos@ and sin@.
3.expand cos^6@ in terms of multiple powers of z based on @.
4.express cos^3@sin^4@ in terms of multiple angles.
NOTE:@ represents theta.
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2.
3,
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