1. The problem statement, all variables and given/known data I am not sure where I am having trouble here. A car id driven 125km west and then 95km southwest. What is the mag and direction of displacement? 2. Relevant equations Triangle method says that if I draw the vectors from tip to tail, the displacement vector is the vector that connects the tail of the first vector to the head of the last one. 3. The attempt at a solution I am assuming (hopefully correctly!) that magnitude is just 230km, but I cannot sem to find direction. If it were 125 west and 95 south of west I could figure it out, but it is 125 west and 95 southwest....so I can't use arctan can I?