Chapter 3, Problem 19P

To determine

The angle between ${\text{r}}_{\text{1}}=6\text{i}-3\text{j}+2\text{k}$ and ${\text{r}}_{\text{2}}=2\text{i}+9\text{j}+10\text{k}$ using inbuilt MATLAB functions $\text{acosd},\text{sqrt}$ and $\text{dot}$.