1. The problem statement, all variables and given/known data Two forces, 422 N at 21◦ (above horizontal) and 256 N at 31◦ (below horizontal) are applied to a car in an effort to accelerate it. Find the direction of the resultant force (in relation to forward, with counterclock- wise considered positive, with −180◦ < < +180◦). Answer in units of ◦. 2. Relevant equations 3. The attempt at a solution I found the resultant from previous question. My resultant=613.711888 N My x component of R=+613.405769 My y component of R=+19.3815275 Arctan (y/x)=arctan (19.3815275/613.405769)=1.809749 My teaching assistant told me that my angle should be negative, but both of my resultant vector components lie in quadrant one, so shouldn't my resulting angle be positive as well?