Here’s a handy tutorial page covering Ohm’s Law (among other things) on the Adafruit site. She’s a very clear writer, and I’m finding the tutorial to be pretty useful.
I mentioned a few functions and structures that I thought yall might find interesting/helpful
Also, here is a great sketch illustrating some of the fun interactions and animations you can construct using trig. Courtesy of Ben Norskov, Math for Code dorkshop teacher extraordinaire.
And just because it’s freaking AWESOME, check this out: