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