यदि $\theta = \tan^{-1}\left(\frac{1}{3}\right) + \tan^{-1}\left(\frac{1}{7}\right) + \tan^{-1}\left(\frac{1}{13}\right) + \tan^{-1}\left(\frac{1}{21}\right) + \tan^{-1}\left(\frac{1}{31}\right)$,तो $\tan \theta =$

  • A
    $\frac{3}{5}$
  • B
    $1$
  • C
    $\frac{5}{7}$
  • D
    $\frac{7}{9}$

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Similar Questions

${\tan ^{ - 1}}\left[ {\frac{{\sqrt {1 + {x^2}} + \sqrt {1 - {x^2}} }}{{\sqrt {1 + {x^2}} - \sqrt {1 - {x^2}} }}} \right]$,जहाँ $|x| < 1$ और $x \ne 0$ है,का मान क्या होगा?

$\cos \left[ {{\cos }^{ - 1}}\left( {\frac{{ - 1}}{7}} \right) + {{\sin }^{ - 1}}\left( {\frac{{ - 1}}{7}} \right) \right] = $

यदि $\alpha = \cos^{-1}\left(\frac{3}{5}\right)$ और $\beta = \tan^{-1}\left(\frac{1}{3}\right)$,जहाँ $0 < \alpha, \beta < \frac{\pi}{2}$,तो $\alpha - \beta$ का मान ज्ञात कीजिए।

यदि $\sum_{n=1}^{2026} \tan^{-1}(\frac{1}{n^2+n+1}) = \tan^{-1}(1 - \frac{1}{x})$, जहाँ $x \neq 0$, तो $x = $

सिद्ध कीजिए कि $\sin ^{-1} \frac{3}{5}-\sin ^{-1} \frac{8}{17}=\cos ^{-1} \frac{84}{85}$

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