Consider the function y = 3 cosx-2 sin.x. R method (a) Express y in the form of Rcos(x+a) where R and a are constants. (b) Sketch the graph of y for 1 cycle. State the amplitude, period and phase shift of y. (c) Hence solve the equation 3 cosx-2 sinx=2 for values of x between 0° and 360°