What would the values of cos(2x) be, with the given other trig function

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter9: Real Numbers And Right Triangles
Section9.7: The Tangent Ration
Problem 12E
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What would the values of cos(2x) be, with the given other trig function?

3
If cos(2)
(in Quadrant-I), find
20
cos(2x) =
(Please enter answer accurate to 4 decimal places.)
Transcribed Image Text:3 If cos(2) (in Quadrant-I), find 20 cos(2x) = (Please enter answer accurate to 4 decimal places.)
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