Application of De Moivre's theorem....

Application of De Moivre's theorem.

`(sin theta + icos theta)^(n) = sin ntheta + i cos ntheta`

`(cos theta + i sin theta)^(n) = cos n theta + i sin ntheta`

`(cos theta + i sin theta)^(-n) = cos n theta - i sin ntheta`

`(cos theta - i sin theta)^(-n) = cos n theta + i sin ntheta`

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The correct Answer is:

A, C

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