tìm tích phân 2sin x/3 dx
Giải thích
\(\int {\frac{{2\sin x}}{3}} \;{\rm{d}}x = \frac{2}{3}\int {\sin } x\;{\rm{d}}x = - \frac{2}{3}\cos x + C\);
\(\int {\frac{{2\sin x}}{3}} \;{\rm{d}}x = \frac{2}{3}\int {\sin } x\;{\rm{d}}x = - \frac{2}{3}\cos x + C\);