$\int \frac{x+\sin x}{1+\cos x} d x=$

  • A
    $x \tan \left(\frac{x}{2}\right)+c$
  • B
    $\log (x+\sin x)+c$
  • C
    $\tan \left(\frac{x}{2}\right)+c$
  • D
    $\log (1+\cos x)+c$

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यदि $f(x)$ का प्रति-अवकलज (antiderivative) $e^x$ है और $g(x)$ का प्रति-अवकलज $\cos x$ है, तो $\int f(x) \cos x \, dx + \int g(x) e^x \, dx =$

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