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If m and x are two real numbers where m ...

If `m` and `x` are two real numbers where `m in I`, then `e^(2micot^(-1)x)((x*i+1)/(x*i-1))^m`
(A)   `cos x+i sin x`   (B)   `m/2`   (C)   `1`    (D)   `(m+1)/2`

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