यदि $x + \frac{1}{x} = \sqrt{3}$ है,तो $x =$

  • 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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यदि $(a + ib)(c + id)(e + if)(g + ih) = A + iB$ है,तो $({a^2} + {b^2})({c^2} + {d^2})({e^2} + {f^2})({g^2} + {h^2}) =$

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