यदि ${\sin ^{ - 1}}\left( {\frac{{2a}}{{1 + {a^2}}}} \right) + {\sin ^{ - 1}}\left( {\frac{{2b}}{{1 + {b^2}}}} \right) = 2{\tan ^{ - 1}}x,$ तो $x = $

  • A
    $\frac{{a - b}}{{1 + ab}}$
  • B
    $\frac{b}{{1 + ab}}$
  • C
    $\frac{b}{{1 - ab}}$
  • D
    $\frac{{a + b}}{{1 - ab}}$

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मान ज्ञात कीजिए: $\sin^{-1}(12/13) + \cos^{-1}(4/5) + \tan^{-1}(63/16) = $

यदि $\sin^{-1} \frac{3}{5} + \cos^{-1} \frac{12}{13} = \sin^{-1} C$ है,तो $C =$

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

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

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

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