Speaking of Feynman, I remember when he was in high school he invented his own notation[0] for sin/cos/tan to use little angular lines, but then the issue he ra

Speaking of Feynman, I remember when he was in high school he invented his own notation[0] for sin/cos/tan to use little angular lines, but then the issue he ran into was that nobody could decipher his math notation and he had trouble helping others learn, so he conformed to the sin/cos/tan notation. [0] https://tex.stackexchange.com/questions/274463/feynman-trig-notation-creating-custom-characters https://tex.stackexchange.com/questions/274463/feynman-trig-...