$\sin ^{-1}\left(\cos \frac{\pi}{13}\right)+\cos ^{-1}\left(\sin \frac{\pi}{13}\right) = $ . . . . . . .

  • A
    $\frac{\pi}{13}$
  • B
    $\frac{15 \pi}{13}$
  • C
    $\frac{11 \pi}{13}$
  • D
    $\frac{9 \pi}{13}$

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मान लीजिए $\tan ^{-1}\left(\tan \frac{5 \pi}{4}\right) = \alpha$ और $\tan ^{-1}\left(-\tan \frac{2 \pi}{3}\right) = \beta$ है। तो:

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 $\tan \theta =$

$2{\sin ^{ - 1}}\frac{3}{5} + {\cos ^{ - 1}}\frac{{24}}{{25}} = $

$\tan ^{-1} \sqrt{3} - \cot ^{-1}(-\sqrt{3}) = $ . . . . . . .

यदि $\tan ^{-1} x = \frac{\pi}{4} - \tan ^{-1} \left( \frac{1}{3} \right)$ है,तो $x$ का मान ज्ञात कीजिए।

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