Computing through graphical and analytical method -physics?

Question

a=100 g at angle 0 degrees

b=150 g at angle 125 degrees

c= 50 g at angle 180 degrees

compute and show the procedures in two ways (by graphical and analytical) the resultant force.

Answer 1

x-component: 100cos(0) + 150cos(125) + 50cos(180) = -36.

y-component:  100sin(0) + 150sin(125) + 50sin(180) = 122.9.

direction:  arctan(-122.9/36) = 106.3 degrees.

Magnitude:  sqrt(36^2 + 122.9^2) = 128 g.

-John