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Express (1)/(1-cos theta+2i sin theta) i...

Express `(1)/(1-cos theta+2i sin theta)` in the form of `a+ib`.

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The correct Answer is:
`((1-cos theta)/(2-2 cos theta+ 3 sin^(2) theta))+i((-2 sin theta)/(2-cos theta+3 sin^(2) theta))`
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