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