Tính ∫ si n ( π 3 − x 4 ) d x
10/20
Tính \[\smallint {\mathop{\rm si}\nolimits} {\rm{n}}\left( {\frac{{\rm{\pi }}}{{\rm{3}}} - \frac{{\rm{x}}}{{\rm{4}}}} \right){\rm{dx}}\]
\[\frac{1}{2}\cos \left( {\frac{{\rm{\pi }}}{{\rm{3}}} - \frac{{\rm{x}}}{{\rm{2}}}} \right){\rm{ + C}}\]
\[4\cos \left( {\frac{{\rm{\pi }}}{{\rm{3}}} - \frac{{\rm{x}}}{{\rm{4}}}} \right){\rm{ + C}}\]
\[2\sin \left( {\frac{{\rm{\pi }}}{{\rm{3}}} - \frac{{\rm{x}}}{{\rm{2}}}} \right){\rm{ + C}}\]
\[\frac{1}{2}\sin \left( {\frac{{\rm{\pi }}}{{\rm{3}}} - \frac{{\rm{x}}}{{\rm{2}}}} \right){\rm{ + C}}\]
Giải thích
Chọn đáp án B