The general function for the cos function is:
y=Acos(B(x+C)) where A is the amplitude, 2πB is the period and phase shift is C .
For our function: f(x) = −4 cos(3x − π) + 1 =-4cos(3(x-π/3))+1
the amplitude is:-4
the phase shift is: -π/3
Answer:
Amplitude: 4; period: 2 pi over 3; phase shift: x = pi over 3; midline: y = 1
Step-by-step explanation:
Use the form a cos (bx-c)+d to find the amplitude, period, phase shift, and vertical shift.
a=-4
b=3
c=pi
d=1
