Express the given product as a sum containing only sines or cosines.   sin(80)cos(30)

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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Express the given product as a sum containing only sines or cosines.
 
sin(80)cos(30)
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