The practice tests don't mimick the actual AP exam. After looking at some questions on their practice test, I had to turn back and look at the cover of the book--I thought that I was looking at some sort of pre-calculus book.



For example, one multiple-choice question (on the practice exam) asks you to complete the double-angle formula for sine(2x). How ridiculous! Such a question would never be on the AP exam.



Another multiple-choice question asks for the interval over which ln(x+3) is nonnegative; Again, another question which is highly unlikely to appear on the AP exam because it's a simple pre-calculus question.