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complex numbers

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115 cis 45*
3 solutions = 120* apart

Are these correct?
115 cis 45*
115 cis 45 + 120 = 165*
115 cis (45 + 120 + 120) = 285*??

WHat is cis?

cos + isin

OH LOL!!!Wish I could help!LOL!But...PLease help me!!:(

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