Have you seen the animation about how sin/cos/tangent are derived? I was absolutely befuddled by trig although I was able to do it by learning rules, until I s

Have you seen the animation about how sin/cos/tangent are derived? I was absolutely befuddled by trig although I was able to do it by learning rules, until I saw that thing. Just in case you haven't: https://www.youtube.com/watch?v=a_zReGTxdlQ https://www.youtube.com/watch?v=a_zReGTxdlQ