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

  • A
    $\sqrt{\frac{x^2+1}{x^2+2}}$
  • B
    $\frac{x}{\sqrt{x^2+1}}$
  • C
    $\frac{1}{\sqrt{x^2+2}}$
  • D
    $\sqrt{\frac{x^2+1}{x^2+2}}$

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$x > 0$ के लिए $\tan ^{-1} \frac{1-x}{1+x}=\frac{1}{2} \tan ^{-1} x$ को हल करें।

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मान ज्ञात कीजिए: $\operatorname{cosec}^{-1}\left[\left(\frac{\tan ^2\left(\frac{\alpha-\pi}{4}\right)-1}{\tan ^2\left(\frac{\alpha-\pi}{4}\right)+1}+\cos \frac{\alpha}{2} \cdot \cot 5 \alpha\right) \sec \frac{11 \alpha}{2}\right]$

यदि $y = \sin^{-1}\left(\frac{x^2 - 1}{x^2 + 1}\right) + \sec^{-1}\left(\frac{x^2 + 1}{x^2 - 1}\right)$,$|x| > 1$ है,तो $\frac{dy}{dx}$ का मान ज्ञात कीजिए:

$\cos ^{-1}\left\{\cot \left(\sum_{i=1}^3 \cot ^{-1} i\right)\right\}=$ . . . . . . .

$\sin ^{-1}\left(\frac{3}{5}\right)-\sin ^{-1}\left(\frac{8}{17}\right)=$ . . . . . .

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