please see an attachment solve don't provide other sourse answer

a. Expand f(x) = x, 0

a. b. C. Expand f (x) = x, (I) Sine Series (II) Cosine Series. We are given that in a half-range Andftt) is periodic with period 27t Sketch the function for three cycles (II) Find the Fourier series forf(t). using half-range series Find the (l) Fourier cosine series, (II) Fourier sine series Of the following function 1 2 4