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2, (a) Expand f(x) = 8, 0 < x < 3, into a cosine series of period 6. (b) Expand f(x) 8, 0<x3, into a sine series of period 6.

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2, (a) Expand f(x) = 8, 0 < x < 3, into a cosine series of period 6. (b) Expand f(x) 8, 0
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