1. The problem statement, all variables and given/known data I=10A,L=0.5m,a=0.3m,x=0.2m 2. Relevant equations 3. The attempt at a solution by the Biot-Savart Law ds cross r=-dxcosθ k(direction k) dB= μI/4π∫-dxcosθ/r^2 B=μI/4π∫-dxcosθ/r^2 (from ?? to ??) in magnitude question: 1) what is ?? to ?? 2)how dx and r respect to dθ????