onde (\omega_{0}=\frac{2\pi}{T}=\frac{\pi}{2}]. Para isso vamos usar as fórmulas a_{0}=\frac{1}{2}\int_{-2}^{2}f(t)\,dt,\quad a_{n}=\frac{1}{2}\int_{-2}^{2}f(t)\cos\bigl(n\omega_{0}t\bigr)\,dt,\quad b_{n}=\frac{1}{2}\int_{-2}^{2}f(t)\sin\bigl(n\omega_{0}t\bigr)\,dt.