Question 878486
f(x) = 7 cos(2x + π) − 3 is in the form f(x) = A*cos(Bx - C) + D


where


A = 7
B = 2
C = -pi
D = -3


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Amplitude: |A| = |7| = 7


Period: T = 2pi/B = 2pi/2 = pi


Phase Shift: C/B = -pi/2 (so we're shifting left pi/2 units)


Midline: D = -3 ---> y = -3


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Put that all together and you get <font color="red">choice B</font> as the final answer.