8.2 Determine the relative phase relationship of the two waves 5pts v(t) 10 cos (377t - 30°) V = (t) 10 cos (377t + 90°) V 8.3 Given the following voltage and current: 10pts i(t)=5 sin (3771 - 20°) V u(t) 10 cos (3771 + 30°) V Calculate the phase difference between v(t) and i(t). Which one leads? 8.6 Calculate the current in the capacitor shown in Fig. P8.6 if voltage input is 100 (a) u(t) = 10 cos (3771 - 30°) V. (b) () 12 sin (3771 + 60°) V. Give the answers in both the time and frequency domains. i(t) v(t) C=1μF Figure P8.6