If $x + \frac{1}{x} = \sqrt{3},$ then $x =$

  • A
    $\cos \frac{\pi}{3} + i \sin \frac{\pi}{3}$
  • B
    $\cos \frac{\pi}{2} + i \sin \frac{\pi}{2}$
  • C
    $\sin \frac{\pi}{6} + i \cos \frac{\pi}{6}$
  • D
    $\cos \frac{\pi}{6} + i \sin \frac{\pi}{6}$

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