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