Thread: sum of cosines
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Old January 14th, 2009, 06:58 AM
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Quote:
Originally Posted by qwerty321 View Post
I have the function: y(t) = (cos(300πt) + sin(500πt))^3

I need too expand the expression of y to get a sum of cosines with positive frequencies. Using
trigonometric identities find the frequencies of resulting sine waves.Can someone help me with that?
Thank you
Why only cosine terms? Why not sine and cosine term?
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