Precalculus Videos

How to Study for UW Math Tests

The Goal of UW Prec

Graph Review for Calc

Find equation for a line

Unit Circle and Trig Facts

Tricks to Remember Trig Values

Proof of the Quad formula with singing

Solving systems: "Set them equal" leads you astray (part 1)

Arithmetic Errors (Part 1): When to distribute

History of the Number e