Show that if p and q are positive integers, then the functions f(x) = cos px and g(x) =
Chapter 6, Problem 19(choose chapter or problem)
Show that if p and q are positive integers, then the functions f(x) = cos px and g(x) = sin qx are orthogonal with respect to the inner product f, g = 2 0 f(x)g(x) dx
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