I had a good friend who got me through Trig and Calc.s
Lost him about 15 years ago - he had numerous health problems
I had let my early math skills slide - he got me back on track in college
Sorry to hear about your friend. I don’t know what it is about the harder math problems (I can add, subtract, multiply and divide ok) that makes my brain lock up- it just goes blank. I have like a sort of photographic memory, and can visualize things I’m recalling, like maps, paragraphs on a page, and t9 this day I can recall pages,of different Animals and their descriptions thst I read as a child (we had an animal encyclopedia set that I read as a child-) etc, but with more complicated math problems, the slate goes blank lol. Took me 2 years to barely get through pre algebra