sin(a + B) sin(a – B) = sin? a – sin² ß

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.2: Trigonometric Equations
Problem 7E
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Prove the identity..

sin(a + B) sin(a – B) = sin? a – sin² ß
Transcribed Image Text:sin(a + B) sin(a – B) = sin? a – sin² ß
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