Question:
Mark $(\sqrt{ })$ against the correct answer in each of the following:
$\int \sqrt{1+\cos 2 x} d x=?$
A. $\sqrt{2} \cos x+C$
B. $\sqrt{2} \sin \mathrm{x}+\mathrm{C}$
C. $-\sqrt{2} \cos x+C$
D. $-\sqrt{2} \sin x+C$
Solution:
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