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What is the phase shift and period for the function y = 5cos2(θ + 45°) − 7?

What is the phase shift and period for the function y = 5cos2(θ + 45°) − 7?
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What is the phase shift and period for the function y = 5cos2(θ + 45°) − 7?

User Guiyo
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5cos2(x + 45) - 7
The period for cos = 2pi/k
The k = 2 so the period = pi
The phase shift is 45 degrees to the left.
User AdamJonR
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