Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. (a)    2 sin(19°) cos(19°)      (b)    2 sin(3theta) cos(3theta)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 15E
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Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula.

(a)    2 sin(19°) cos(19°)      (b)    2 sin(3theta) cos(3theta)
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