Problems 52 61. The purpose of these problems is to keep the material fresh in your
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Problems 52 – 61. The purpose of these problems is to keep the material fresh in your mind so that you are better prepared for later sections, a final exam, or subsequent courses such as calculus.
Find the exact value of cos80° cos70° − sin80° sin70°.
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To find the exact value of cos80 cos70 sin80 sin70 well use the trigonometric identities cosa b cosa ...View the full answer
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Related Book For 
Precalculus Concepts Through Functions A Unit Circle Approach To Trigonometry
ISBN: 9780137945139
5th Edition
Authors: Michael Sullivan
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