College Calculus

<p>So I want to take Calculus in college. However, I will have to take an accuplacer test in order to do so (even though I already took PreCalc??). Anyway, I was wondering if you guys knew any good websites to brush up on Trig/PreCalc?</p>

<p>Also, as a hypothetical, let's say I don't do well enough on the accuplacer, and I don't take Calc. How feasible is it to self-study it and take the AP test?</p>