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De Moivre’s Theorem :
It is a formulauseful for findingpowersandrootsofcomplex numbers.
Say, given a complex number z, and you have to find its cube. Dont use the usual method to multiply z three times. It becomes easier from De moivre's theorem.z^3 = r^3 ( cosx + sinx)^3 = r^3 ( cos3x + sin3x)Thanks
Bharat BajajIIT Delhi
askiitians faculty
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