કિંમત શોધો: $\sin 6^{\circ} + \sin 54^{\circ} + \sin 126^{\circ} + \cos 156^{\circ}$

  • A
    $\frac{\sqrt{5}+1}{4}$
  • B
    $\frac{\sqrt{5}-1}{4}$
  • C
    $-\frac{1}{2}$
  • D
    $\frac{3}{4}$

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