Change the variables to observe the phasors.
Using KVL and phasor algebra, the input voltage of the circuit is obtained and then, converted to the time domain.
\( V_a = \frac{A}{\sqrt{2}} \angle \theta_a = \)?
\( V_b = \frac{B}{\sqrt{2}} \angle \theta_b = \)?
\( E_{in} = V_a + V_b = \)?
\( e_{in}(t) = \)? ?
■ \( V_a \) ■ \( V_b \) ■ \( E_{in} \)