मान ज्ञात कीजिए: ${\tan ^{ - 1}}1 + {\tan ^{ - 1}}2 + {\tan ^{ - 1}}3$

  • A
    $\frac{\pi }{2}$
  • B
    $\frac{\pi }{4}$
  • C
    $0$
  • D
    इनमें से कोई नहीं

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फलन $\cos^{-1}(\sin x)$ का $x$ के सापेक्ष अवकलन कीजिए।

यदि $\tan ^{-1}\left(\frac{x+1}{x-1}\right)+\tan ^{-1}\left(\frac{x-1}{x}\right)=\tan ^{-1}(-7)$ है,तो $x$ का मान ज्ञात कीजिए।

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

$\tan \left(\cos ^{-1}\left(\frac{4}{5}\right)+\tan ^{-1}\left(\frac{2}{3}\right)\right)$ का मान है

$\operatorname{Tan}^{-1} \left( \frac{\sqrt{8-2 \sqrt{15}}}{\sqrt{15}+1} \right) + \operatorname{Tan}^{-1} \left( \frac{1}{\sqrt{5}} \right) =$

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