Question:
If $\overrightarrow{\mathrm{a}}=(3 \hat{\mathrm{i}}+\hat{\mathrm{j}}-5 \hat{\mathrm{k}})$ and $\overrightarrow{\mathrm{b}}=(\hat{\mathrm{i}}+2 \hat{\mathrm{j}}-\hat{\mathrm{k}})$ then find a unit vector in the direction of $(\overrightarrow{\mathrm{a}}-\overrightarrow{\mathrm{b}})$.
Solution:
