Thursday 1 February 2018

De Moivre's Theorem



(1) If n is any rational number, then (cos θ + i sin θ)n = cos nθ + i sin nθ.
de-moivres-theorem-1
(2) If z = (cos θ1 + i sin θ1) (cos θ2 + i sin θ2) (cos θ3 + i sin θ3)………… (cos θn + i sin θn)
then z = cos (θ1 + θ2 + θ3 + ……… + θn) + i sin (θ1 + θ2 + θ3 + ……… + θn)
where θ1 + θ2 + θ3 + ……… + θn ∈ R.

DE MOIVRE'S THEOREM

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