Here is what I've read so far (I've been starting from first principles). Basically, I've been reading through the series "Humungous Book of x Problems", having read (and about to read) the following:
1. Humungous Book of Basic Math and Pre-Algebra Problems
2. Humungous Book of Algebra Problems (still actually going through this)
3. Humungous Book of Trigonometry Problems (up to vectors)
4. Will be reading Humungous book of Calculus Problems soon and then the Humungous Book of Geometry Problems.
I know this sounds slanted, but I'm a big fan of these books. However, I also had to do what you did with Trigonometry - one of the extremely irritating things is that nobody teaches you why the names are sine, cosine, tangent, cotangent, secant and cosecant. For me, I had to go to do some elementary research and draw the lines on a circle to understand that sine was "gap" or "bow" (corruption of the original Arabic), tangent was based on tangens (to touch) and secant was based on secans (to cut). Once I worked that out, actually everything started to get rather a lot easier. Sure wish I'd had easy Internet access in high-school and a more adventurous intellect!
1. Humungous Book of Basic Math and Pre-Algebra Problems
2. Humungous Book of Algebra Problems (still actually going through this)
3. Humungous Book of Trigonometry Problems (up to vectors)
4. Will be reading Humungous book of Calculus Problems soon and then the Humungous Book of Geometry Problems.
I know this sounds slanted, but I'm a big fan of these books. However, I also had to do what you did with Trigonometry - one of the extremely irritating things is that nobody teaches you why the names are sine, cosine, tangent, cotangent, secant and cosecant. For me, I had to go to do some elementary research and draw the lines on a circle to understand that sine was "gap" or "bow" (corruption of the original Arabic), tangent was based on tangens (to touch) and secant was based on secans (to cut). Once I worked that out, actually everything started to get rather a lot easier. Sure wish I'd had easy Internet access in high-school and a more adventurous intellect!