यदि $\sin ^{-1}\left(\frac{x}{5}\right) + \csc ^{-1}\left(\frac{5}{4}\right) = \frac{\pi}{2}$ है,तो $x = $

  • A
    $4$
  • B
    $5$
  • C
    $1$
  • D
    $3$

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यदि $y = \cot^{-1} \left( \frac{1 + x}{1 - x} \right)$ है,तो $\frac{dy}{dx} = $

$\sin [\cot ^{ - 1}(\cos \tan ^{ - 1}x)] =$

समीकरण $\tan ^{-1}(1+x)+\tan ^{-1}(1-x)=\frac{\pi}{2}$ का हल है

$\frac{d}{dx}(\sin^{-1}(3x - 4x^3)) = $

मान लीजिए $S_{k} = \sum_{r=1}^{k} \tan^{-1}\left(\frac{6^{r}}{2^{2r+1} + 3^{2r+1}}\right)$. तो $\lim_{k \rightarrow \infty} S_{k}$ का मान ज्ञात कीजिए।

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