What happens when you encounter a circuit that has resistors, inductors, and capacitors in series or parallel? How do you figure out what the phase relationship in a series/parallel reactance and resistive circuit?
That’s what phasor diagrams are for. There are phasor solvers for Matlab, and you can even do it by hand. The [appendix on phasor diagrams from Fundamentals of Circuit Analysis is online](https://onlinelibrary.wiley.com/doi/pdf/10.1002/0471758159.app1)
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