[SOLVED] Identities Help? Thanks!
Ok, our teacher has been very busy lately so he hasn't been around to help us and he isn't available after/before school at the moment. So here i am XD
This one i have no clue where to begin:
Prove that each side of the equation equals each other (or something like that, i don't have the book infront of me)
*I'd assume that you have to factor the cos's but i have no clue how to do that*
I also don't know where to begin with this one..
*Again i'd assume u have to factor the cos's into something?*
Thanks for ANY help anyone can give!!!