यदि $4 \sin ^{-1} x + 6 \cos ^{-1} x = 3 \pi$ है,तो $x = \ldots$.

  • A
    $\frac{1}{\sqrt{2}}$
  • B
    $\frac{1}{2}$
  • C
    $0$
  • D
    $-\frac{1}{2}$

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यदि $x>0, y>0, z>0, xy+yz+zx < 1$ और यदि $\tan^{-1} x + \tan^{-1} y + \tan^{-1} z = \pi$ है,तो $x+y+z$ का मान क्या होगा?

यदि ${\tan ^{ - 1}}\frac{{x - 1}}{{x + 2}} + {\tan ^{ - 1}}\frac{{x + 1}}{{x + 2}} = \frac{\pi }{4}$,तो $x =$

यदि $\cos ^{-1} \alpha+\cos ^{-1} \beta+\cos ^{-1} \gamma=3 \pi$ है,तो $\alpha(\beta+\gamma)+\beta(\gamma+\alpha)+\gamma(\alpha+\beta)$ का मान ज्ञात कीजिए।

यदि $\cos^{-1} \frac{3}{5} - \sin^{-1} \frac{4}{5} = \cos^{-1} x$ है,तो $x = $

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