I've used LaTeX extensively to write notes for my degree (math classes) and I can't stop recommending Tikz, it's one of the best parts of LaTeX. The Tikz/PGF manual [1] is absolutely great, as I could find solutions there for most things I wanted to do. There's support for 3D plots too, cached compilation (tikz-external IIRC), and quite a lot of useful libraries. I managed to do pretty complex drawings, and all of that integrated into the rest of the text.
If you write LaTeX, invest some time in learning Tikz if you need to do a drawing, it's worth it.
If you write LaTeX, invest some time in learning Tikz if you need to do a drawing, it's worth it.
1: https://www.bu.edu/math/files/2013/08/tikzpgfmanual.pdf