<p>ok Im taking IB math SL 2 and we're covering AP calc. but see I ALWAYS sucked at trigonometry. I was supposed to take it before i took SL 1 but they let some ppl slide with an exception. so i had no trig background and with a fast pace course I barely made it through the trig chapters. any good book that'll help me with trig? especially on solving trig functions and equations please! i need to survive this class!</p>