यदि $\sin x \cosh y = \cos \theta$ और $\cos x \sinh y = \sin \theta$ है,तो $\sinh^2 y =$

  • A
    $\cosh^2 x$
  • B
    $\cos^2 x$
  • C
    $\sin^2 x$
  • D
    $\sinh^2 x$

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यदि $\tan^2 \alpha \tan^2 \beta + \tan^2 \beta \tan^2 \gamma + \tan^2 \gamma \tan^2 \alpha + 2\tan^2 \alpha \tan^2 \beta \tan^2 \gamma = 1$ है,तो $\sin^2 \alpha + \sin^2 \beta + \sin^2 \gamma$ का मान क्या है?

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यदि $a \tan \alpha + b \tan \beta = (a + b) \tan \left( \frac{\alpha + \beta}{2} \right)$ और $\alpha - \beta \neq 2n\pi$ है,तो $\frac{\cos \beta}{\cos \alpha} = $

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