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If `"log"_(2) "sin" x - "log"_(2) "cos" x - "log"_(2) (1-"tan"^(2) x) =-1`, then x =
A. `(npi)/(2) + (n)/(8), n in Z`
B. `n pi - (pi)/(8), n in Z`
C. `(npi)/(4) + (pi)/(2), n in Z`
D. none of these

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Correct Answer - A

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