# Question #e27ab

If we are to find out the vector of magnitude 3 in the direction of $\vec{v} = 3 \hat{i} + 4 \hat{j}$,then we can have it by taking a scalar multiple of the unit vector of $\vec{v}$ by 3.
$= 3 \times \frac{1}{\sqrt{{3}^{2} + {4}^{2}}} \times \left(3 \hat{i} + 4 \hat{j}\right)$
$= \frac{3}{5} \left(3 \hat{i} + 4 \hat{j}\right)$