I am studying trig on my own in order to prepare myself for calculus. Just wondering how much I need to know. For example, would being familiar with the unit circle and inverse functions suffice, or should I thoroughly study every chapter of my trig book and know every concept to the best of my ability? My last prof said that in algebra there are some concepts which really aren't necessary unless you intend to do computer programming...So I thought maybe there are some similar scenarios with trig where certain concepts just are not going to apply to calculus and beyond. I only ask because I would like to start studying calc on my own as soon as possible so that I'm confident when I start my class, but I don't want to get ahead of myself, even if it is only self study! :) Thanks for you input!