$2^{-i}$ के मुख्य मान का वास्तविक भाग है

  • A
    $\sin (\log 2)$
  • B
    $\cos \left(\frac{1}{\log 2}\right)$
  • C
    $\cos \left[\log \left(\frac{1}{2}\right)\right]$
  • D
    $\cos (\log 2)$

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