SOLUTION: How to find the amplitude and period. y = -4 cos 1/2 x help would be very appreciated, thank you!

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Question 910139: How to find the amplitude and period.
y = -4 cos 1/2 x
help would be very appreciated,
thank you!
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
How to find the amplitude and period.
y = -4 cos 1/2 x
***
Equation for cos function: y=Acos(Bx-c), A=amplitude,period=2π/B
For given function:
y=-4cos(x/2)
amplitude=4
B=1/2
period=2π/B=2π/(1/2)=4π