यदि $\tan ^{-1} 2 x+\tan ^{-1} 3 x=\frac{\pi}{4}$ है,तो $x$ का मान ज्ञात कीजिए।

  • A
    $\frac{1}{6}$
  • B
    $-\frac{1}{6}$
  • C
    $1$
  • D
    $\frac{5}{6}$

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यदि $\tan ^{-1}\left(\frac{x+1}{x-1}\right)+\tan ^{-1}\left(\frac{x-1}{x}\right)=\tan ^{-1}(-7)$ है,तो $x$ का मान ज्ञात कीजिए।

यदि $y = \operatorname{cosec}^{-1}\left[\frac{\sqrt{x}+1}{\sqrt{x}-1}\right] + \cos^{-1}\left[\frac{\sqrt{x}-1}{\sqrt{x}+1}\right]$ है,तो $\frac{dy}{dx} = $

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यदि $\frac{\pi}{4} + \sum_{p=1}^{11} \tan^{-1} \left(\frac{2^{p-1}}{1+2^{2p-1}}\right) = \tan^{-1} \alpha$ है,तो $\tan \alpha$ का मान . . . . . . है।

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