Additional Open Resources
This is another open precalculus / college algebra & trig book. It is a good source of additional practice problems, as well as more rigorous explanation of some topics.
A good additional reading for trig. Contains some nice applications to other disciplines.
This is another open textbook, used by the University of Washington. It is intended for a one-quarter problem solving refresher course before calculus. This book is a great source of interesting application and multistep problems.
An archive of old exams from UW's precalculus class. This is a great source of interesting and multistep problems.
Precalculus videos from Khan Academy.
Another great source of algebra and precalculus videos
An online graphing calculator that can find intersections, max/mins, and intercepts
A great tool when you need help solving tricky equations
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