1. The problem statement, all variables and given/known data The electric potential at points in an xy plane is given by V = (2.7 V/m2)x2 -(4.4 V/m2)y2. What are (a) the magnitude of the electric field at the point (3.4 m, 1.6 m) and (b) the angle that the field there makes with the positive x direction. 2. Relevant equations I have already taken the partial derivatives of V with respect to x and y to get the components to the field and then the magnitude. Ex=18.36 V/m and Ey=-14.08 V/m 3. The attempt at a solution The magnitude of the field at the given point is 23.137 V/m. I absolutely cannot for the life of me figure out how to calculate that angle, and I know it's in front of my face. I've tried arctan, but it just doesn't work.