Answer
$-37.51^{\circ} $
Work Step by Step
We have the sum of three vectors as:
$\vec{a}+\vec{b}+\vec{c}=(30.35\hat{i}-23.3\hat{j})\ m $
The direction of the vector is thus given by:
$\theta= tan^{-1}(\frac{-23.3}{30.35})$
$\theta = -37.51^{\circ} $
