Question

The angle between vector $\overrightarrow{A}$ and $-2\overrightarrow{A}$ is

• A. $0^{\circ }$
• B. ${180}^{\circ }$
• C. ${360}^{\circ }$
• D. ${90}^{\circ }$

Answer 1

The correct option is B ${180}^{\circ }$

$\overrightarrow{A}$ and $-2\overrightarrow{A}$ are anti-parallel. Hence the angle between them is ${180}^{\circ }$.