Find the smallest interval in x over which the functions sin(x/xo) and cos(Tx/xo) are orthogonal. On the same interval, are the following pairs of functions orthogonal? a) sin(x/ro) and sin(27x/xo). b) sin(x/ro) and sin(Tx/xo). c) sin(x/xo) and sin(Tx/2x0).

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