(a) Given that the function, f(x) defined within the interval 0

(a) Given that the function, f (x) defined within the interval 0 x < 6, where Using the concept ofhalf-range cosine Fourier series, (ii) (iii) Sketch its graph on the interval 6 x < 18 . Find the half-range cosine Founer series for T (x). State the first three non-zero terms of the Fourier cosine series of f (x). [3 marks] [5 marks] [2 marks]