The function is .

Rewrite the function.

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The standard form of the cosine function is .

Where is the amplitude, is the vertical shift and .

Compare the function with .

and midline is .

The Amplitude of the Function is .

The period of a cosine function is .

Phase shift of a function is .

The function is .

The amplitude of the function is , so the graph is in between  and on -axis.

The period of the function is .

Therefore, the cosine wave starts from to

The interval of the function is  .

Divide the interval into four subintervals, each of length .

The points are ,, ,  

The end points of the subintervals are

Locate the key points:

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Locate few more points for second cycle:

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Graph:

Graph the function .

Draw a coordinate plane.

Plot the points on the graph.

Connect the points using smooth curve.

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The amplitude of the function is .

The period of the function is .

The phase shift of the function is  .

Graph of the function  is

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