$\sin \left( {2{{\tan }^{ - 1}}\left( {\frac{1}{3}} \right)} \right) + \cos ({\tan ^{ - 1}}(2\sqrt 2 ))$ का मान ज्ञात कीजिए।

  • A
    $\frac{16}{15}$
  • B
    $\frac{14}{15}$
  • C
    $\frac{12}{15}$
  • D
    $\frac{11}{15}$

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$\sin^{-1} \frac{1}{\sqrt{5}} + \cot^{-1} 3$ का मान ज्ञात कीजिए।

$\tan \left( \tan^{-1} \frac{1}{2} - \tan^{-1} \frac{1}{3} \right)$ का मान क्या है?

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

यदि ${({\tan ^{ - 1}}x)^2} + {({\cot ^{ - 1}}x)^2} = \frac{{5{\pi ^2}}}{8}$ है,तो $x$ का मान ज्ञात कीजिए।

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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 = $

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