Question:
All $x$ satisfying the inequality
$\left(\cot ^{-1} x\right)^{2}-7\left(\cot ^{-1} x\right)+10>0$, lie in the interval:-
Correct Option: , 4
Solution:
$\cot ^{-1} x>5, \quad \cot ^{-1} x<2$
$\Rightarrow x<\cot 5, x>\cot 2$
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