1. The problem statement, all variables and given/known data From the circuit find the impedances of the capacitor and inductor Is(t)=15 cos(500t) A 2. Relevant equations 3. The attempt at a solution So is this right? Convert the 15 cos 500t into polar form, 15<0 I. Then the resistor is 8 ohms, so 15*8 = 120 V. Therefore, to find the impedance capacitor is v(t)=120 cos(500t) Zc= -1/(0.2*10^-3 * 500) =-j10 but now I'm stuck. How do find grad is(t)?