Phasor diagram (& its applications) | Alternating currents | Physics | Khan Academy

Phasors are rotating vectors having the length equal to the peak value of oscillations, and the angular speed equal to the angular frequency of the oscillations.
They are helpful in depicting the phase relationships between two or more oscillations. They are also a useful tool to add/subtract oscillations.

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just an addition, phasor is a combination of two words: phase + vector

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