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OpenStudy (anonymous):
Use DeMoivre's theorem to find the indicated power of (5+5i)^3? (rectangular form)
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OpenStudy (anonymous):
first, express the situation: \[ 5+5i=r(\cos\theta+i\sin\theta) \]
OpenStudy (anonymous):
what do we get for "r" and theta?
OpenStudy (anonymous):
r=5 and I am not quite sure how to find theta...is it tan(x)=b/a?
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