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 $\big(\overrightarrow{u},\overrightarrow{v}\big)=\big(\overrightarrow{AB},\overrightarrow{AC}\big)=\widehat{BAC}$.