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Concept explainers
Use the formula for the cosine of the difference of two angles to solve Exercises 1-12.
In Exercises 5-8, each expression is the right side of the formula for
a. Identify
b. Write the expression as the cosine of an angle.
c. Find the exact value of the expression.
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Chapter 6 Solutions
Algebra and Trigonometry (6th Edition)
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