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November 23, 2014

Homework Help: math- periodic

Posted by stevie! on Wednesday, November 22, 2006 at 3:22pm.

How do you prove algebraically whether the following is periodic?

f(x) = 3cos3x + 5sin4x

The sum of two periodic functions is always periodic. In your case, note than when x is a multiple of 2 pi, both functions repeat the values of x = 0.

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