SOLUTION: I need to know the amplitude and period of y=4cos(3.14x)+4 If a graph can be shown that would be helpful as well

Question 588281: I need to know the amplitude and period of y=4cos(3.14x)+4
If a graph can be shown that would be helpful as well
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Amplitude:

In general, the amplitude of is

In your case, . So . So the amplitude of is 4.

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Going back to the general equation , the period is

In the equation , the value of B is . So the period is

So the period is approximately 2.00101442903809

Note: this value is close to 2 because 3.14 is close to . If you really meant instead of , then the period would truly be 2.

A graph of is shown below

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