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Changes in Period and Phase Shift of Sine and Cosine Functions

Question 31 • AZ-Common Core Algebra II B

Which could be an equation for this function?y = cos(x – 3)✔ y = cos(x/3)y = cos(3x)

Answer
A
y = cos(x – 3)
B
✔ y = cos(x/3)
C
y = cos(3x)