A periodic function with period 2π can be expanded as Σ(a_n cos nx + b_n sin nx), with coefficients given by orthogonality integrals. Converges to f at points of continuity.
A periodic function with period 2π can be expanded as Σ(a_n cos nx + b_n sin nx), with coefficients given by orthogonality integrals. Converges to f at points of continuity.