TeX source:

\begin{aligned}&\theta=\tan ^{-1}\left(\frac{F_{y}}{F_{x}}\right) \\&\theta=\tan ^{-1}\left(\frac{3.6 \times 10^{5} \mathrm{~N}}{2.7 \times 10^{5} \mathrm{~N}}\right)=53^{\circ}\end{aligned}