$\int e^x \left( \frac{1 + \sin x}{1 + \cos x} \right) dx = $ . . . . . . $+ c$.

  • A
    $e^x \tan x$
  • B
    $e^x \tan \frac{x}{2}$
  • C
    $e^x \cot \frac{x}{2}$
  • D
    $e^x \cot x$

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