Two functions f(x) and g(x) are said to be orthogonal on [a, b] if ' f(x)g(x)dx...

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Two functions f(x) and g(x) are said to be orthogonal on [a, b] if ' f(x)g(x)dx = 0. Show that sin 2r and cos 3x are orthogonal on [-T, 7). Two functions f(x) and g(x) are said to be orthogonal on [a, b] if ' f(x)g(x)dx = 0. Show that sin 2r and cos 3x are orthogonal on [-T, 7).