यदि $\omega$ इकाई का एक अवास्तविक घनमूल है,तो $\cos \left[ \left\{ (1-\omega)(1-\omega^2) + (2-\omega)(2-\omega^2) + \dots + (2017-\omega)(2017-\omega^2) \right\} \cdot \frac{\pi}{2017} \right]$ का मान ज्ञात कीजिए।

  • A
    $-1$
  • B
    $0$
  • C
    $1$
  • D
    $\frac{\sqrt{3}}{2}$

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$\sqrt{i} = $

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