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If x in (pi,(3pi)/2),then 4cos^2(pi/4-x/...

If `x in (pi,(3pi)/2),`then `4cos^2(pi/4-x/2)+sqrt(4sin^4x+sin^2 2x)` is always equal to (a) 1 (b) 2 (c) `-2` (d) none of these

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