1. The problem statement, all variables and given/known data obtain a thevenin equivalent circuit given that iS(t)=3cos(4x10^4)t A. to that end: a) transform the circuit to the phasor domain. b) apply source-transformation technique to obtain the thevenin equivalent circuit at terminals (a,b). c) transform the phasor-domain thevenin circuit back to the time domain. 2. Relevant equations Z(C) = -j/wC Z(L) = jwL 3. The attempt at a solution realizing that the phasor counterpart to the current was 3A, and given w=4x10^4, was able to calculate 1st the impedences of capacitor/inductor, Z(C) = -50j, and Z(L) = 40j. combined Z(R1) + Z(L) to obtain Z1 = 25+40j ignoring the 350/37ohm, was able to combine R2+Z(C) to obtain Z2= 35-50j now tried node analysis, by designating V1 as the node just above the current source. V1/Z1 + V1/Z2 - iS(t) = 0 V1/Z1 + V1/Z2 = iS(t) V1/25+40j + V1/35-50j = 3 i could then find V(th) as V1*Z(C)/(Z(C)+R2). i haven't worked this out yet but can anyone tell me if this is the right approach?