What is the exact value of cos(495°)? 21 DI

Trigonometry (MindTap Course List)
10th Edition
ISBN:9781337278461
Author:Ron Larson
Publisher:Ron Larson
Chapter2: Analytic Trigonometry
Section2.4: Sum And Difference Formulas
Problem 1ECP: Find the exact value of cos12.
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What is the exact value of cos(495°)?
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Transcribed Image Text:What is the exact value of cos(495°)? B 21 2.
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I have used the trigonometry ratio

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