$\frac{\sqrt{3}\text{cosec } 20^{\circ}-\sec 20^{\circ}}{\cos 20^{\circ}\cos 40^{\circ}\cos 60^{\circ}\cos 80^{\circ}}$ का मान किसके बराबर है?

  • A
    $32$
  • B
    $16$
  • C
    $64$
  • D
    $12$

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यदि $\tan \theta = \frac{x \sin \phi}{1 - x \cos \phi}$ और $\tan \phi = \frac{y \sin \theta}{1 - y \cos \theta}$ है,तो $\frac{x}{y} = $

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