But for most of my work (<50v DC devices) almost any time I deal with an "AC" signal or "AC component" in a signal it is not AC at all, it is just a varying DC waveform. For instance a sinewave centred on 2v DC with peaks at 3v and 1v DC.
The term "AC signal" is completely wrong as the current does not alternate at all unless driving a reactive load. And "current" is not even right as what I have is a VOLTAGE sinewave, a DC voltage sinewave. Why should I call it an "AC sinewave"? It's very annoying terminology.
I'm for modernisation of broken archaic terms, so "DC sinewave" is fine as would be "DV sinewave" which may even be more accurate as it is a voltage sinewave not a current one.