$4 \tan^{-1} \frac{1}{5} - \tan^{-1} \frac{1}{239}$ का मान ज्ञात कीजिए।

  • A
    $\pi$
  • B
    $\frac{\pi}{2}$
  • C
    $\frac{\pi}{3}$
  • D
    $\frac{\pi}{4}$

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

यदि $y = \sec^{-1}\left(\frac{1}{2x^2 - 1}\right)$ है,तो $\frac{dy}{dx}$ ज्ञात कीजिए,जहाँ $0 < x < \frac{1}{\sqrt{2}}$.

मान ज्ञात कीजिए: $\tan^{-1} \left( \frac{a - b}{1 + ab} \right) + \tan^{-1} \left( \frac{b - c}{1 + bc} \right)$

सिद्ध कीजिए कि $\sin ^{-1} \frac{8}{17}+\sin ^{-1} \frac{3}{5}=\tan ^{-1} \frac{77}{36}$

$\cot^{-1} \frac{3}{4} + \sin^{-1} \frac{5}{13} = $

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