$\int \cos (\log _e x) dx$ का मान किसके बराबर है? (जहाँ $C$ समाकलन का एक स्थिरांक है।)

  • A
    $x[\cos (\log x)-\sin (\log x)]+C$
  • B
    $\frac{x}{2}[\sin (\log x)-\cos (\log x)]+C$
  • C
    $\frac{x}{2}[\sin (\log x)+\cos (\log x)]+C$
  • D
    $x[\cos (\log x)+\sin (\log x)]+C$

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