Report copyright - hoitoanhoc// 3 2 1 e ln 1 4 lnx x dx x ³ S 2 0 ³ x x xdxcos .sin 2 0 sin 1 sin xx dx x S ³ 2 2 0 cos 2 .sinx xdx S ³ 2 n 0 1 sin cos ( )x xdx n N
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