11. Express the product sin60 cos40 as a sum. 1/2 (sin100-sin20) O (sin50-sine) 1/2 (sin100+sin20) O (sin50+sine)
11. Express the product sin60 cos40 as a sum. 1/2 (sin100-sin20) O (sin50-sine) 1/2 (sin100+sin20) O (sin50+sine)
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.5: Product-to-sum And Sum-to-product Formulas
Problem 34E
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