Question:
Mark $(\sqrt{)}$ against the correct answer in each of the following:
$\int x^{2} \cos x d x=?$
A. $x^{2} \sin x+2 x \cos x-2 \sin x+C$
B. $2 x \cos x-x \sin x+2 \sin x+C$
C. $x^{2} \sin x-2 x \sin x+2 \sin x+C$
D. none of these
Solution:
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