Now, to find the resultant force, add up their and components, taking as positive to the right, and positive upwards, using sines and cosines as appropriate. I'll do the one for you:
, where is the component of the resultant force.
Do the same for , the sum of the -components.
Then, using a right-angled triangle with sides and work out the magnitude of the resultant, using and the angle the resultant makes with the -direction, which is .