THese are problems from my textbook. The answers for these questions are in the back of the book but i'm unsure how to work towards those answers.
1. (a) 44.7 N (b) 107.1 N
2.  3.30 kN  66.6 degrees
3.  (a) 2190 N. (b) 2060 N
4. 654 N   21.5 degrees

1. Two forces P and Q are applied as shown at point A of a hook suport. Knowing that P=75 N and Q = 125 N. Determine by trigonometry (a) the required magnitude of the force Q if the resultant R of the two forces applied at A is to be vertical, (b) the corresponding magnitude of R.

2, Solve by trigonometry. Two forces are applied at point B of beam AB. Determine graphically the magnitude and direction of their resultant using (a) the parallelogram law, (b) the triangle rule

3.  The hydraulic cylinder BD exerts on member ABC a force P directerd along line BD. Knowing that P must have a 750-N component perpendicular to memeber ABC, determine (a) the magnitude of the force P, (b) it's compnenet parallel to ABC

4. Determine the resultant of the three forces.  X and Y