9
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Trigonometric Double Angle Identities

Question 9 • CUSD Advanced Math B (5.0)

Over the interval [0, 2π), what are the solutions to cos(2x) = cos(x)? Check all that apply.

Answer
A
0
B
StartFraction pi Over 3 EndFraction
Option B
C
StartFraction 2 pi Over 3 EndFraction
Option C
D
Pi
Option D
E
StartFraction 4 pi Over 3 EndFraction
Option E
F
StartFraction 5 pi Over 3 EndFraction
Option F
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