$\sqrt{3} \operatorname{cosec} 20^{\circ} - \sec 20^{\circ}$ का मान है:

  • A
    $2$
  • B
    $4$
  • C
    $3$
  • D
    इनमें से कोई नहीं

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यदि $x = \sin 130^\circ \cos 80^\circ$,$y = \sin 80^\circ \cos 130^\circ$,और $z = 1 + xy$ है,तो निम्नलिखित में से कौन सा सत्य है?

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