A bucket of water which weighs 11.3 Newtons is pulled vertically using two forces. The first of magnitude 8.7 Newtons acts at an angle 51 degrees from the vertical. The second acts at an angle 15 degrees from the vertical. Find the net force acting on the bucket (due to the forces and the weight) in Newtons. How do I find the magnitude of the second when only the angle is given for it?