$\int e^{x / 2}\left(\frac{2+\sin x}{1+\cos x}\right) d x=$

  • A
    $2 e^{x / 2} \operatorname{cosec}\left(\frac{x}{2}\right)+c$
  • B
    $2 e^{x / 2} \tan \left(\frac{x}{2}\right)+c$
  • C
    $2 e^{x / 2} \cos \left(\frac{x}{2}\right)+c$
  • D
    $2 e^{x / 2} \sin \left(\frac{x}{2}\right)+c$

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