Let cos 6 and O is in QI. What is the value of cos(20)? 3 1 9. 9. 4 - 4/9

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section: Chapter Questions
Problem 41RE
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Let cos 6
and A is in QI. What is the value of cos(20)?
1
1/9
Transcribed Image Text:Let cos 6 and A is in QI. What is the value of cos(20)? 1 1/9
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