Use the figure to find the exact value of the following trigonometric function. 8. cos (2a) 15 cos (2a) = (Simplify your answer.) %3D

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.3: Trigonometric Functions Of Real Numbers
Problem 70E
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In need of calculus help ;^;
19
Use the figure to find the exact value of the
following trigonometric function.
8.
cos (2a)
15
cos (2a) = (Simplify your answer.)
%3D
box
Transcribed Image Text:19 Use the figure to find the exact value of the following trigonometric function. 8. cos (2a) 15 cos (2a) = (Simplify your answer.) %3D box
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