Using phases to solve AC networks only works for excitation

Using phases to solve AC networks only works for ________________ excitation and only at one ____________.

Solution

Phasor method is only used for sinusoidal type excitation.

Eg: sint, cost, sin(t+A) etc.

Phasor method works at a single frequency.

So Answer is

using phasors to solve ac networks only works for sinusoidal type excitation and only at one frequency