definite-integral

Question: $\int_{\,0}^{\,1}{\,{{\tan }^{-1}}\left( \frac{1}{{{x}^{2}}-x+1} \right)\,dx}$ is



1) ln 2
2) $-\ln 2$
3) $\frac{\pi }{2}+\ln 2$
4) $\frac{\pi }{2}-\ln 2$
Solution: Explanation: No Explanation
Properties of definite integration

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