Question:
Mark $(\sqrt{)}$ against the correct answer in the following:
$\int_{0}^{\pi / 4} \log (1+\tan x) d x=?$
A. $\frac{\pi}{4}$
B. $\frac{\pi}{4} \log 2$
C. $\frac{\pi}{8} \log 2$
D. 0
Solution:
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