$($ urabic$)$:

Section:

$3.(10$ points$)$ Determine the output curent $i_0(t)$ in the circuit shown in Fig $3.$ The input voltage is represented in the amplitude$-$phase form of the Fourier series as follows:

$v(t)=4+{\displaystyle \underset{n=1}{\overset{}{}}}\frac{4(-1{)}^n}{\sqrt[\phantom{2}]{1+n^2}}cos(nt+ta{n}^{-1}(n))$