Find $\int x \cos 2 x d x$
A) $\frac{1}{2} x \sin 2 x+\frac{1}{4} \cos 2 x+C$

Multiple Choice

Find $\int x \cos 2 x d x$ .

A) $\frac{1}{2} x \sin 2 x+\frac{1}{4} \cos 2 x+C$
B) $\frac{1}{2} x \sin 2 x-\frac{1}{2} \cos 2 x+C$
C) $-\frac{x^{2}}{8} \sin 2 x+C$
D) $\frac{x^{2}}{4} \sin 2 x+C$