Cho 2 vectơ $\overrightarrow{u}=\overrightarrow{AB}$, $\overrightarrow{v}=\overrightarrow{AC}$. Khi đó $\big(\overrightarrow{u},\overrightarrow{v}\big)$ bằng
| $\widehat{ABC}$ | |
| $90^\circ$ | |
| $\widehat{ACB}$ | |
| $\widehat{BAC}$ |
Chọn phương án D.
Ta có $\big(\overrightarrow{u},\overrightarrow{v}\big)=\big(\overrightarrow{AB},\overrightarrow{AC}\big)=\widehat{BAC}$.