JEE Main 2019 — Math solution | Fundamenthol

JEE Main2019Math

Q.

All x satisfying the inequality $(cot^{- 1} x)^{2} - 7 (cot^{- 1} x) + 10 > 0,$ lie in the interval :-

A
$(cot 2, \infty)$
B
$(cot 5, co t 4)$
C
$(\infty -, cot 5) \cup (cot 4, cot 2)$
D
$(\infty -, cot 5) \cup (cot 2, \infty)$

Solution

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