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Solution set of the inequality ( cot^(...

Solution set of the inequality
`( cot^(-1) x)^(2) - ( 5 cot^(-1) x) + 6 gt 0` is

A

(cot 3, cot 2)

B

`(-oo, cot3)cup(cot2,oo)`

C

`(cot2,oo)`

D

None of these

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The correct Answer is:
B
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