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If (cot^-1 x)^2−7(cot^-1 x)+10 > 0 then...

If `(cot^-1 x)^2−7(cot^-1 x)+10 > 0` then range of x will be (A) `(-oo,cot 2)` (B) `(-oo,cot5)` (C) `(cot2,cot5)` (D) `(cot2,oo)`

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