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Math Help - Use complex numbers to solve problems

  1. #1
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    Arrow Use complex numbers to solve problems

    Use De Moivre's theorem to simplify the following. Leave your answers in the polar form r cis θ.

    a) [2(cos π/4 + i sin π/4)]^5

    b) [√2(cos π/6 - i sin π/6)]^4
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  2. #2
    Junior Member
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    Jun 2006
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    Wink

    a) 32cis 5pie/4

    b) 4cis -2pie/3
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