JEE Math Practice Question
The value of $$\int\limits_{ - \pi }^\pi {{{{{\cos }^2}} \over {1 + {a^x}}}dx,\,\,a > 0,} $$ is
- A.$$a\,\pi $$
- B.$${\pi \over 2}$$
- C.$${\pi \over a}$$
- D.$${2\pi }$$
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