How do we arrive at a formula for the product sin A cos B?
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 44E
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Question
How do we arrive at a formula for the product sin A cos B?
Expert Solution
Step 1
We have to derive an expression for .
We start off with the sum of angles formulae
Adding these expressions vertically, we obtain: .
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