The force F1 component to East = 36cos20 = 33.83N

The force F1 component to North = 36sin20 = 12.31

The force F2 component to West = 48cos42 = 35.67N

The force F2 component to South = 48sin42 = 32.12N

Let take forces to East and north as positive.

Then forces to West and South are negative forces to East and North forces.

Total force to East    = 33.83-35.67 = -1.84N

Total force to North  = 12.31-32.12 = -19.81N

Resultant force = sqrt[(-1.84)^2+(-19.81)^2] = 19.89N

Direction of resultant force = tan^(-1) (-19.81/-1.84)

                                       = 84.69 deg.

The resultant force is a force of 19.89N to the direction of 84.69 deg. below due west.