So I’m looking for some applications that are relatively easy to understand, ideally in like CS or physics, but anything works. I’ve seen it be talked about in discussions of oscillations (I have a pretty good basic understanding of pendulum motion, for example, but I don’t understand how complex numbers come in), or in AC currents (I have like 0 background in electricity and magnetism apart from basic high school physics with super basic DC systems), but I can never understand how we use complex numbers for that…
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Complex numbers lets you do math on a 2D plane. This is useful when you have things that can be represented using vectors. The real part represents the left- or right-ness of the vector, while the imaginary part represents the up- or down-ness.
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