Solve this following

Question:

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

$\int_{-\pi}^{\pi} x^{3} \cos ^{3} x d x=?$

A. $\pi$

B. $\frac{\pi}{4}$

C. $2 \pi$

D. 0

Solution:

If $\mathrm{f}$ is an odd function,

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