Trig Identities: cos^2(2x) + sin^2(2x), os^2(x)-1/sin(x),
I've done a few problems on a homework assignment related to Trig identities, but I can't figure out how to simplify some problems. I have the identities in front of me, but I can't see how they can be applied. I missed class when we went over them. 4. co...