5.3 Complex Numbers and Complex Arithmetic
The phasor method (invented in 1893 by Charles Proteus Steinmetz, 1865-1923) is the backbone of AC steady-state circuit analysis
The principle benefit of the phasor method is that its concepts essentially render AC steady-state circuit analysis analogous to DC steady-state analysis¾by way of complex arithmetic ¾so that the entire differential-equations process is circumvented!
However, in order to gainfully employ the phasor method, the electric circuit analyst must be proficient in working with complex numbers, complex arithmetic and complex algebra