Sinusoidal steady-state analysis is a method used to analyze the behavior of circuits when they are subjected to sinusoidal input voltages or currents and have reached a stable, repeating pattern of response. Rather than solving complex differential equations, sinusoidal steady-state analysis employs phasor analysis to simplify circuit calculations. Phasor analysis is a technique used in sinusoidal steady-state analysis to simplify the analysis of circuits with sinusoidal inputs. It leverages the fact that in the steady state, all voltages and currents in a linear circuit driven by sinusoidal sources will also be sinusoidal and at the same frequency. Phasors allow us to represent these sinusoidal quantities as complex numbers, which makes solving circuit equations much easier. This chapter explores sinusoidal steady-state analysis through various examples.