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

  • A
    $\frac{1}{2}$
  • B
    $-\frac{1}{2}$
  • C
    $1$
  • D
    $0$

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$\tan \left(\cos ^{-1}\left(\frac{4}{5}\right)+\tan ^{-1}\left(\frac{2}{3}\right)\right)$ का मान है

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

$2{\tan ^{ - 1}}\left[ {\sqrt {\frac{{a - b}}{{a + b}}} \tan \frac{\theta }{2}} \right] = $

Difficult
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यदि $\theta = \tan^{-1} a$,$\phi = \tan^{-1} b$ और $ab = -1$ है,तो $\theta - \phi = $

$\tan ^{-1} 2+\tan ^{-1} 3=$

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