I was able to graduate from high school early, so now im at a community college, and i need to take calc I for an economics major. I don't want to have to take two classes(trig and precalc) in order to take calc I. So ive decided that ill teach myself both of those subjects so that i can get a higher score on the placement test(as well as actually understanding the math itself) and thus avoid having to spend two semesters in pre-req classes. my algebra is alright i probably need to brush up though,never took and trig. I checked out the Trig for dummies book from the library and ive found it to be well written and im considering purchasing it on amazon along with the workbook as well as the algebra II book for dummies and workbook by the same author. However, i thought id see what you guys at this forum have to say about which book i should use. Thanks.