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The equation correspond to the graph is .
Observe the graph :
The distance from the maximum to the minimum value of the function is
Half of the distance from the maximum to the minimum value of the function is
So the amplitude is .
Period
Here the function completes one period on .
Substitute Period in Period .
The midline appears at , there is no vertical shift.
Since the midline appears at , the value of is zero.
Since there is no vertical shift, the value of is zero.
Substitute , , and .
The equation correspond to the graph is .
The equation correspond to the graph is .
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