11. The value of $\int - ח ( \cos 2 x / 1 + a x ) d x , a > 0$, is
III askllTians ||
... Powered By IITians
(A) $\sqcap$
(B) ап
(C) $\pi / 2$
(D) $2 \sqcap$
11. The value of $\int - ח ( \cos 2 x / 1 + a x ) d x , a > 0$, is

\section*{III askllTians ||}
... Powered By IITians\\
(A) $\sqcap$\\
(B) ап\\
(C) $\pi / 2$\\
(D) $2 \sqcap$\\