7. Solve for all solutions on [0,27): 4 cos (2a)+1=4cos² (a) :
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.2: Trigonometric Equations
Problem 30E
Question
I need help with #7
Transcribed Image Text:63
a. sin(2x)=
32
b. cos(2x) = 31
63
c. tan(2x)=
32
31
7. Solve for all solutions on [0,2л): 4 cos (2a)+1=4 cos² (a): a
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