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Solving Complex Variable Equations : DeMoivre's Theorem

Find the values of:


The answer is:

cos(pi*sqrt(3)[1/2+2k]) + i.sin(pi*sqrt(3)[1/2+2k]), for any integer k.

keywords: de moivres, de moivre's

Solution Preview

this is a neat application of de moivre's formula; indeed, this should remind you of how to extract roots of complex numbers! as a first step you would need to write the base of the exponent in polar form, so

i = 0 + 1i = cos (pi/2) + i sin (pi/2)

but the effect of ...

Solution Summary

De Moivre's theorem is applied. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.