यदि $0 < x < \frac{1}{\sqrt{2}}$ और $\frac{\sin ^{-1} x}{\alpha}=\frac{\cos ^{-1} x}{\beta}$ है,तो $\sin \left(\frac{2 \pi \alpha}{\alpha+\beta}\right)$ का मान $......$ है।

  • A
    $4 \sqrt{1-x^{2}}(1-2 x^{2})$
  • B
    $4 x \sqrt{1-x^{2}}(1-2 x^{2})$
  • C
    $2 x \sqrt{1-x^{2}}(1-4 x^{2})$
  • D
    $4 \sqrt{1-x^{2}}(1-4 x^{2})$

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यदि $\tan (x + y) = 33$ और $x = \tan^{-1}(3)$ है,तो $y$ का मान क्या होगा?

यदि $\cos^{-1}\left(\frac{x}{a}\right) + \cos^{-1}\left(\frac{y}{b}\right) = \alpha$ है,तो $\frac{x^2}{a^2} - \frac{2xy}{ab}\cos \alpha + \frac{y^2}{b^2} = $

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यदि $2 \tan^{-1}(\cos x) = \tan^{-1}(2 \operatorname{cosec} x)$ है,तो $x$ का मान ज्ञात कीजिए।

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