Categoria: formulae.app / Matemáticas / Series de Fourier / Función PAR f(x) con periodo p=2L
$${\displaystyle f(x)={\frac {a_{0}}{2}}+\sum _{n=1}^{\infty }a_{n}\cos {\frac {n\pi x}{L}}}$$
$$a_{0}={\frac {2}{L}}\int _{-L}^{L}f(x)dx$$
$$a_{n}={\frac {2}{L}}\int _{0}^{L}f(x)\cos {\frac {n\pi x}{L}}dx$$
$$b_{n}=0$$