यदि $(\alpha+\beta)$,$\frac{\pi}{2}$ का गुणज नहीं है और $3 \sin (\alpha-\beta)=5 \cos (\alpha+\beta)$ है,तो $\tan \left(\frac{\pi}{4}+\alpha\right)+4 \tan \left(\frac{\pi}{4}+\beta\right)=$

  • A
    $0$
  • B
    $1$
  • C
    $4$
  • D
    $2$

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$\left( 1 + \cos \frac{\pi }{9} \right) \left( 1 + \cos \frac{3\pi }{9} \right) \left( 1 + \cos \frac{5\pi }{9} \right) \left( 1 + \cos \frac{7\pi }{9} \right)$ का मान है

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यदि $(1 + \sin A)(1 + \sin B)(1 + \sin C) = (1 - \sin A)(1 - \sin B)(1 - \sin C)$ है,तो प्रत्येक पक्ष किसके बराबर है?

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यदि $\sinh x = \tan A$ है,तो $|\tanh x| =$

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