$\tan \left[ \cos^{-1} \frac{4}{5} + \tan^{-1} \frac{2}{3} \right] =$

  • A
    $6/17$
  • B
    $17/6$
  • C
    $7/16$
  • D
    $16/7$

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यदि $\tan ^{-1} \frac{x-1}{x-2}+\tan ^{-1} \frac{x+1}{x+2}=\frac{\pi}{4}$ है,तो $x$ का मान ज्ञात कीजिए।

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$\cot \left[\sum_{n=3}^{32} \cot ^{-1}\left(1+\sum_{k=1}^n 2 k\right)\right]=$

यदि $y = \sin^{-1} \left( \frac{5x + 12\sqrt{1-x^2}}{13} \right)$ है,तो $\frac{dy}{dx} = $

$4 \tan^{-1} \frac{1}{5} - \tan^{-1} \frac{1}{239}$ का मान ज्ञात कीजिए।

$x$ का वह मान जो $\sin \left(\cot ^{-1} x\right)=\cos \left(\tan ^{-1}(1+x)\right)$ को संतुष्ट करता है,है

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