1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution According to my notes when a circuit is in DC steady state inductors are short circuited and capacitors are open circuited. This leads me to believe that the voltage across the capacitor is basically the voltage looking in through the terminal of the open circuit: -----------R------o + | | ------------------o _ if it's an open circuit then no current flows through R. (7sin12t - Vc)/R = 0 Vc = 7sin12t This doesn't seem right to me, can anyone tell me where i'm going wrong? thanks in advance.