Tension, Angles, Forces Problem

[whoopie88]

Homework Statement

Two crewmen pull a boat through a lock, as shown in Figure 5-25. One crewman pulls with a force of F1 = 115 N at an angle of θ = 36° relative to the forward direction of the raft. The second crewman, on the opposite side of the lock, pulls at an angle of 45°. With what force F2 should the second crewman pull so that the net force of the two crewmen is in the forward direction?

Homework Equations

All Forces Equations.

The Attempt at a Solution

 

[PeterO]

Homework Statement

Two crewmen pull a boat through a lock, as shown in Figure 5-25. One crewman pulls with a force of F1 = 115 N at an angle of θ = 36° relative to the forward direction of the raft. The second crewman, on the opposite side of the lock, pulls at an angle of 45°. With what force F2 should the second crewman pull so that the net force of the two crewmen is in the forward direction?

Homework Equations

All Forces Equations.

The Attempt at a Solution

For the net force to be along the canal, the components of force across the river have to be equal.
You were using cos function which would relate to components along the canal.