A sinusoidal magnitude is characterized by an equation of the type :
The Fresnel Representation, with vectors that are also called "phasors", is a means of representing a sinusoidal function by just taking the amplitude and the phase of origin into account. This representation is very useful in optics or in electronics, for summing, taking the derivatives of and integrating sinusoidal functions of the same frequency, but of different amplitudes and phases.
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