Yes, if Rl includes all the impedance the collector sees - in this case, RL // C4 // input impedance of the next stage, to name a few. Similarly, Re = Re // C3.1-does this mean:Vout/Vin=-RL/RE
Ie ~= Ic and (delta) Ie = Vin / (RE//C3)2-how can i conclude this mathematically?