Mac 1147

Im a junior in high school who is taking mac1147(precalc and trig) the class is supposed to be a review of trig and precalc. However, I have yet to take hs precalc or trig all i have taken was alg 1 hon, geo hon, alg 2 hon, and college algebra all i have got an A in. I just find the class extremly difficult and was wondering is anyone had study tips mostly for trig.