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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This note was uploaded on 01/21/2012 for the course MAC 1130 taught by Professor Dr.cheun during the Fall '11 term at FSU.
- Fall '11