De Moivre's Formula #163
Description
De Moivre's Formula
(cos x + isin x)n = cos(nx) + isin(nx)
from
(1) (eix)n = einx
(2) (cos x + i sin x)n = cos(nx) + isin(nx)
As per https://fermatslasttheorem.blogspot.com/2006/02/eulers-formula.html
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