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JEE Mains · Maths · STD 12 - 2. inverse trigonometric function

यदि किसी \(\alpha, \beta\) के लिए; \(\alpha \leq \beta, \alpha+\beta=8\) और \(\sec ^2\left(\tan ^{-1} \alpha\right)+\operatorname{cosec}^2\left(\cot ^{-1} \beta\right)=36\), तो \(\alpha^2+\beta\) = ___ है।

  1. A 10
  2. B 12
  3. C 14
  4. D 16
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Correct Answer

(C) 14

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Detailed explanation

\(\begin{aligned} & \text { Let } \tan ^{-1} \alpha=A \Rightarrow \tan A=\alpha \\ & \cot ^{-1} \beta=B \Rightarrow \cot B=\beta \\ & \sec ^2 A+\operatorname{cosec}^2 B=36 \\ & \Rightarrow 1+\tan ^2 A+1+\cot ^2 B=36 \\ & \Rightarrow \alpha^2+\beta^2=34 \end{aligned}\) Also…
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