Is there a more efficient method of trig mastery than rote memorization?
i find myself loosing it in 1st semester calculus, mainly because people are using trigonometric identities i never heard of before.
Are those usually explained in any way? They're listed in the front of the book, and that's it. We also never did those in Highschool (maybe the people here did, I'm not from here).
I could go ahead and memorize all of those, but I think that's stupid. So where did you learn those or is it just something I'll have to figure out myself?