Consider (a) Determine bn from (3.3.11), (3.3.12), and (3.5.6). (b) Fo...

Consider

(a) Determine bn from (3.3.11), (3.3.12), and (3.5.6).

(b) For what values of x is (3.5.12) an equality?

*(c) Derive the Fourier cosine series for x3 from (3.5.12). For what values of x will this be an equality?

Reference 3.3.11:

Reference 3.3.12:

Reference 3.5.6: