P=V010+H1c0s91+2l2c0s2+…(n=gn-vn) 9.-- the angle on the equivalent impedance of the network at the angular frequency of no Vn, ln---the effective values of respective sine function In the special case of a single frequency sinusoidal voltage, Vo=V2-V3=.0 P=VI, cos 9 For a dc voltage Vi=v2=V3=.0 P=volo-VIcos cos ... P =V0 I 0 +V1 I 1 1 +V2 I 2 2 + ( ) n  n  n = − the angle on the equivalent impedance of the network at the angular frequency of . n − − n Vn , In ---the effective values of respective sine function. In the special case of a single frequency sinusoidal voltage, V0=V2=V3=…=0 = 1 1 1 P V I cos For a dc voltage V1=V2=V3=…=0 P=V0 I0=VI