\int _ { - \pi / 2 } ^ { \pi / 2 } x \operatorname { sin } x d x = 2 \ – InterviewSolution

1.	\int _ { - \pi / 2 } ^ { \pi / 2 } x \operatorname { sin } x d x = 2 \int _ { 0 } ^ { \pi / 2 } x \operatorname { sin } x d x
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