$2-36$ Resolve each force acting on the gusset plate into its and $y$ components and express each force as a Cartesian vector. A

gusset plate is a thin metal plate for connecting beams and girders to columns

Horizontal component of $650N$ force is $\frac{4}{5}($horizontal distance $/$ hypothenuse$)$

Vertical component of $650N$ force is $\frac{4}{5}($vertical distance $/$ hypothenuse$)$

Sum of horizontal components is the sum of components in i$-$direction

Sum of vertical components is the sum of components in i$-$direction