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In this video I show you how to turn a sum of trigonometric functions to a product of trigonometric
functions and a product of trigonometric functions to a sum of trigonometric functions. When you take
a Calculus course you may find some of these formulas useful.
Prof. Serna. Math, Statistics & Physics Tutor. Miami.
10300 SW 72nd Street, Suite 460-5, Miami, FL 33173.