Mark against the correct answer in each of the following:

Question:

Mark $(\sqrt{ })$ against the correct answer in each of the following:

$\int \cos (\log x) d x=?$

A. $\frac{x}{2}[\cos (\log x)-\sin (\log x)]+C$

B. $\frac{x}{2}[\cos (\log x)+\sin (\log x)]+C$

C. $2 x[\cos (\log x)+\sin (\log x)]+C$

D. $2 x[\cos (\log x)-\sin (\log x)]+C$

Solution:

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