Electric Field Over A Uniformly Charged Area---- Please help! 1. The problem statement, all variables and given/known data Imagine a square in the xy plane with each side of length a. It has a uniform charge per unit area (σ). The center of that square is at the origin. Determine the electric field at a distance z above the center. 2. Relevant equations 3. The attempt at a solution I have attached my work. However, I feel like I have made a mistake somewhere since I don't know how to solve my integral. He told me to find Ez and Ex, and that Ex should equal 0 when I work it out. Thanks in advance!