1. The problem statement, all variables and given/known data I need help solving this force problem: Two crewmen pull a raft through a lock. One person is pulling from a 45 degree angle above the horizontal and the other is pulling at a 35 degree angle below the horizontal with a force of 130N. the middle of the boat (laying horizontally) can be the horizontal reference for the angles. Also, both crewmen are pulling from the same end of the boat, and in the same horizontal direction so that the boat moves in the direction they pull. The question is, what force will the person pulling from the 45 degree angle have to exert to make the boat move in the desired direction (toward the pullers)? 2. Relevant equations [tex]\sumF[/tex]Fx=mAx 3. The attempt at a solution Fx=130Ncos(35)? I know I have to make the x and y force components equal zero, I am having trouble understanding what to use (cos or sin) for each angle and what sign they should have.