Find the exact value of cos.

Trigonometry (MindTap Course List)
10th Edition
ISBN:9781337278461
Author:Ron Larson
Publisher:Ron Larson
Chapter2: Analytic Trigonometry
Section2.5: Multiple-angle And Product-to-sum Formulas
Problem 5ECP
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Find the exact value of cos.
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Transcribed Image Text:Find the exact value of cos. 11x undefined
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