The values of $tan^2(sec^{-1}2)+cot^2(cosec^{-1}3),$ is
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 11
$\theta = \sec^{-1}(2) \Rightarrow \sec\theta = 2$
$\cos\theta = \frac{1}{2}, \quad \sin\theta = \frac{\sqrt{3}}{2}$
$\tan\theta = \sqrt{3} \Rightarrow \tan^2(\sec^{-1}2) = 3$
$\phi = \sin^{-1}\left(\frac{1}{3}\right)$
$\sin\phi = \frac{1}{3}, \quad \cos\phi = \frac{2\sqrt{2}}{3}$
$\cot\phi = \frac{\cos\phi}{\sin\phi} = 2\sqrt{2}$
$\cot^2(\sin^{-1}\frac{1}{3}) = 8$
$\text{Sum} = 3 + 8 = 11$
The value is $11$.