જો $A = 133^\circ$ હોય,તો $2\cos \frac{A}{2}$ ની કિંમત કેટલી થાય?

  • A
    $-\sqrt{1 + \sin A} - \sqrt{1 - \sin A}$
  • B
    $-\sqrt{1 + \sin A} + \sqrt{1 - \sin A}$
  • C
    $\sqrt{1 + \sin A} - \sqrt{1 - \sin A}$
  • D
    $\sqrt{1 + \sin A} + \sqrt{1 - \sin A}$

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