$\tan 7\frac{1}{2}^\circ$ નું મૂલ્ય કેટલું થાય?

  • A
    $\sqrt{6} + \sqrt{3} + \sqrt{2} - 2$
  • B
    $\sqrt{6} - \sqrt{3} + \sqrt{2} - 2$
  • C
    $\sqrt{6} - \sqrt{3} + \sqrt{2} + 2$
  • D
    $\sqrt{6} - \sqrt{3} - \sqrt{2} - 2$

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$\sin {163^\circ} \cos {347^\circ} + \sin {73^\circ} \sin {167^\circ} = $

$\sin 75^\circ = $

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