यदि $3 \sin \alpha = 5 \sin \beta$ है,तो $\tan \left(\frac{\alpha + \beta}{2}\right) \div \tan \left(\frac{\alpha - \beta}{2}\right) = $

  • A
    $1$
  • B
    $2$
  • C
    $3$
  • D
    $4$

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$x \in (0, \pi)$ के लिए $\frac{8}{3\sin x - \sin 3x} + 3\sin^2 x \le 5$ के वास्तविक मानों की संख्या क्या है?

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