यदि $\cos(\log x)$ का आदि फलन (primitive) $f(x)\{\cos(g(x)) + \sin(h(x))\}$ है,तो निम्नलिखित में से कौन सा सत्य है?

  • A
    $h^{\prime}(x) = \frac{-1}{x}$
  • B
    $f^{\prime}(x) = \frac{1}{2}$
  • C
    $g^{\prime}(x) = \log(x)$
  • D
    $h(x) = \frac{x}{2}$

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