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Prove each identity.   sin (A + B) + sin (A - B) = 2 sin A cos B

Prove each identity.   sin (A + B) + sin (A - B) = 2 sin A cos B

Trigonometry (11th Edition)
Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.
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Prove each identity.

 

sin (A + B) + sin (A - B) = 2 sin A cos B

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