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Page 1 of 2 14.7 Using Double- and Half-Angle …
www.classzone.comPage 1 of 2 876 Chapter 14 Trigonometric Graphs, Identities, and Equations Evaluating Trigonometric Expressions Given cos u = º3 5 with π < u < 3 2 π, find the following. a.sin 2u b.sin 2 u SOLUTION a.Use a Pythagorean identity to conclude that sin u = º 4