Question:
Mark $(\sqrt{)}$ against the correct answer in each of the following:
$\int x \sin 2 x d x=?$
A. $\frac{1}{2} \mathrm{x} \cos 2 \mathrm{x}+\frac{1}{4} \sin 2 \mathrm{x}+\mathrm{C}$
B. $-\frac{1}{2} x \cos 2 x-\frac{1}{4} \sin 2 x+C$
C. $-\frac{1}{2} x \cos 2 x+\frac{1}{4} \sin 2 x+C$
D. none of these
Solution:
