Question

The angle between the two vectors $\hat{i}+\hat{j}$ and $\hat{j}+\hat{k}$ is:

• A. ${30}^0$
• B. ${45}^0$
• C. ${60}^0$
• D. ${90}^0$

Answer 1

Answer: (C)

${60}^0$

$\Theta ={\cos }^{-1}(\overrightarrow{A}.\overrightarrow{B})/|\overrightarrow{A}||\overrightarrow{B}|={\cos }^{-1}\left(1/2\right)={60}^{\circ }$