High Quality Content by WIKIPEDIA articles! In physics and engineering, a phase vector, or phasor, is a representation of a sine wave whose amplitude (A) and angular frequency (?) are time-invariant. It is a subset of a more general concept called analytic representation. Phasors decompose the behavior of a sinusoid into three independent factors that relay amplitude, frequency and phase information. This can be particularly useful because the frequency factor (which includes the time-dependence of the sine wave) is often common to all the components of a linear combination of sine waves. In these situations, phasors allow this common feature to be factored out, leaving just the time-independent amplitude and phase information (the latter simply defining the phase at t=0 as ?), which can be combined algebraically rather than trigonometrically. Similarly, linear differential equations can be reduced to algebraic ones. The term phasor therefore often refers to just those two factors. In...

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