$\int_0^{\pi /4} {\log (1 + \tan \theta )\,d\theta = } $

  • A
    $\frac{\pi }{4}\log 2$
  • B
    $\frac{\pi }{4}\log \frac{1}{2}$
  • C
    $\frac{\pi }{8}\log 2$
  • D
    $\frac{\pi }{8}\log \frac{1}{2}$

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