SOLUTION: the graph of a cosine function has amplitude 4, period 90degrees, and a vertical translation 3 units down. write an equation for the function

Question 878832: the graph of a cosine function has amplitude 4, period 90degrees, and a vertical translation 3 units down. write an equation for the function
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
the graph of a cosine function has amplitude 4, period 90degrees, and a vertical translation 3 units down. write an equation for the function
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Form of equation for cos function: y=Acos(Bx-C)+D, A=amplitude, period=360/B, phase shift=C/B, D=vertical shift.
For given problem:
amplitude=4
period=90˚=360/B
B=4
C=0
Phase shift: none
Vertical shift:3 units down
Equation: y=4cos(4x)-3
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