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Talk:De Moivre's formula

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De Moivre's formula is actually true for all complex numbers x and all real numbers n, but this requires careful extension of several functions to the complex plane. <-- Loisel I'm not so sure this makes any sense.


Thanks for pointing that out; n has to be an integer. x can be complex however, since Euler's formula

e^(ix) = cos(x) + i sin(x)
works for all complex x. --AxelBoldt
Is the function described as a [multivalued function]? in fact a periodic function?
Yes it is. It is 2π periodic, because sin and cos are. --AxelBoldt



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