To begin, we must first understand what sinusoidal signals are. Sinusoidal signals can be represented as
where A is the amplitude, Ο is the frequency in radians per second, and ΞΈ is the phase angle in degrees(phase shift). We can return to the sinusoidal signal by taking the real part of Eulerβs formula:
For the moment, consider single-frequency circuits. Every steady state current and voltage will have the same basic form:
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