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If 4sin^2x+1/4 cosec^2 x=2, x in (0,pi/2...

If `4sin^2x+1/4 cosec^2 x=2, x in (0,pi/2)` then `cos^2x+5sinx cosx=7sin^2x` is equal to (A) `(10+5sqrt3)/4` (B) `10-5sqrt3` (C) `10+5sqrt3` (D) none of these

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