$I = \int \cos(\ln x) \, dx$. તો $I =$

  • A
    $\frac{x}{2} \{\cos(\ln x) + \sin(\ln x)\} + c$
  • B
    $x^2 \{\cos(\ln x) - \sin(\ln x)\} + c$
  • C
    $x^2 \sin(\ln x) + c$
  • D
    $x \cos(\ln x) + c$

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