(a) Use a graphing utility to graph the functions f (x) = 2 cos 2x + 3 sin 3x and g(x) = 2 cos 2x + 3 sin 4x.
(b) Use the graphs from part (a) to find the period of each function.
(c) Is the function h(x) = A cos ax + β sin βx, where a and β are positive integers, periodic? Explain.