1. The problem statement, all variables and given/known data Find the x-component of the electric field at the origin due to the full arc length for a charge of 3.8 μC and a radius of 1.9 m. The value of the Coulomb constant is 8.98755 × 109 N · m2/C2. 2. Relevant equations E = kq/r^2 dq = q dθ λ = Q/ (R θ) 3. The attempt at a solution I said E = kq/r^2 And so Ex = kq/r2 * sinθ and dEx = k*dq/r2 * sinθ and dq = λ ds ds = R dθ λ = q/s so dq = Q/θ dθ I get kq/r2 ∫sinθ/ θ dθ But when I input the answer from this integral (from the calculator) the answer is wrong.