Inverse Trigonometric Functions

Bihar Board Class 12 · Mathematics · 106 past questions

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1. Q4 2026 Set A2026 Set F

   Prove that $\tan^{-1} 1+\tan^{-1} 2+\tan^{-1} 3=\pi$.

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2. Q6 2026 Set A

   Prove that $\sec^2(\tan^{-1} 2)+\operatorname{cosec}^2(\cot^{-1} 3)=15$.

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