2. Simplify: cos(+ x) cos(-x) = sin(n + x) sin(x + 37)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 40E
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2. Simplify:
COS(π + x) cos(x) = sin(n + x) sin(x + ³)
Transcribed Image Text:2. Simplify: COS(π + x) cos(x) = sin(n + x) sin(x + ³)
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