Hi there! I'm planning to take a placement exam for math so as to test into calculus or at minimum pre-calc. I've been reviewing pre-calc/ algebra/ trig and most of it is coming back to me, but there are definitely areas where I need a refresher. Does you know of any online resources you'd recommend? Have been looking around at Kahn Academy and various other sites, and also using GRE guides - just wondering if there's anything else I might be missing? Thanks!
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