: Expand the following function in a cosine series, 5.-4

Expand the following function in a cosine series, 5 6 5 and then using the notation from Problem #2 above, (a) find the value of co. (b) find the function gl(n, x). Expand the following function in a cosine series, 5 6 5 and then using the notation from Problem #2 above, (a) find the value of co. (b) find the function gl(n, x).