Using Sum & Difference Formulas

Precalc Problems Explained

English - October 30, 2010 03:39 - 95.3 MB Video - ★★★★★ - 4 ratings
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Previous Episode: Some more Trig Word Problems (4.8, 4.R)

Next Episode: Trig with Vectors, Complex Numbers, apps (Precalc 6)

Here we find the trig functions of other angles based on the sum and difference of two angles, the double or half angle. We will prove these formulas in a different video