1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution So, given these two components of the vector A, to find the angle the vector makes with the X axis I simply did the following: So theta is -71.1 with significant figures. and that's not the expected answer either? What am I doing wrong? Do they really want the angle "measured counterclockwise from that axis" meaning: 360-71.1 ?