pl ans Q3 (multi choice type)

Dear Student,

Let I = \int \sqrt{1 + \cos x} dx = \int \sqrt{2 \cos^{2} (\frac{x}{2})} dx = \sqrt{2} \int \cos (\frac{x}{2}) dx = 2 \sqrt{2} \sin (\frac{x}{2}) + C

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