definite-integral

Question: $\int_{-\,\pi /2}^{\,\pi /2}{\,\frac{\sin x}{1+{{\cos }^{2}}x}{{e}^{-{{\cos }^{2}}x}}dx}$ is equal to



1) $2{{e}^{-1}}$
2) 1
3) 0
4) None of these
Solution: Explanation: No Explanation
Properties of definite integration

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