Integral of even functions (1 Viewer)

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Would the integral of two even functions be 0 or not? I have an integral cos(t)*cos(2nt)that goes from 0 to pi/2 and was wondering if that would automatically be 0 or would the integral of cos(t)*sin(2nt) from 0 to pi/2 be 0? Thanks!


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If the interval of integration is not SYMETRIC (ex: (-L,L), you cannot conclude.

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