यदि $z = \sin \theta - i \cos \theta$ है,तो किसी भी पूर्णांक $n$ के लिए

  • A
    $z^{n} + \frac{1}{z^{n}} = 2 \cos \left(\frac{n \pi}{2} - n \theta\right)$
  • B
    $z^{n} + \frac{1}{z^{n}} = 2 \sin \left(\frac{n \pi}{2} - n \theta\right)$
  • C
    $z^{n} - \frac{1}{z^{n}} = 2 i \sin \left(n \theta - \frac{n \pi}{2}\right)$
  • D
    $z^{n} - \frac{1}{z^{n}} = 2 i \cos \left(\frac{n \pi}{2} - n \theta\right)$

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${\left( \frac{\sqrt{3} + i}{2} \right)^6} + {\left( \frac{i - \sqrt{3}}{2} \right)^6}$ का मान ज्ञात कीजिए।

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