यदि $\cos^{-1} \sqrt{p} + \cos^{-1} \sqrt{1-p} + \cos^{-1} \sqrt{1-q} = \frac{3\pi}{4}$ है,तो $q$ का मान ज्ञात कीजिए।

  • A
    $1$
  • B
    $\frac{1}{\sqrt{2}}$
  • C
    $\frac{1}{3}$
  • D
    $\frac{1}{2}$

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यदि $y=\tan ^{-1}\left(\frac{3 x-x^3}{1-3 x^2}\right)+\tan ^{-1}\left(\frac{4 x-4 x^3}{1-6 x^2+x^4}\right)$ है, तो $\frac{d y}{d x}$ का मान क्या होगा?

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

यदि ${\tan ^{ - 1}}x + {\tan ^{ - 1}}y + {\tan ^{ - 1}}z = \pi ,$ तो $\frac{1}{{xy}} + \frac{1}{{yz}} + \frac{1}{{zx}} = $

$\tan^{-1} \left[ \frac{\sqrt{1+x^2} + \sqrt{1-x^2}}{\sqrt{1+x^2} - \sqrt{1-x^2}} \right] = $

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