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Unformatted text preview: = cos 6 x + sin 4 x What about the amplitude? Unfortunately we can not use the technique from Example 5.9, since we are not taking the cosine and sine of the same angle; we are taking the cosine of 6 x but the sine of 4 x . In this case, it appears from the graph that the maximum is close to 2 and the minimum is close to 2. In Chapter 6, we will describe how to use a numerical computation program to show that the maximum and minimum are 1.90596111871578, respectively (accurate to within 2.2204 10 16 ). Hence, the amplitude is 1.90596111871578....
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- Fall '11