1. The problem statement, all variables and given/known data What's the projection of the resultant force onto an said axis? 2. Relevant equations Sine Law, Cosine Law 3. The attempt at a solution For problem 2/20, the projection onto the b axis was found by multiplying the resultant force by the cosine of 30 degrees. Why does this method not work for problem 2/4? Why do we need to add in the b-component of the resultant force? The questions are uploaded as pictures along with the solutions. Thank you!