The following represents the graph of the function: f(x) = cosx]cos[r+] (points) Based on the graph of this function do the following: (10)a. Use your understanding of how to identify the parameters of the sinusoidal function y = asin(bx + c) + d or y = a cos(bx + c) + d to write the equation of a simpler function p(x) that describes the graph. Explain your choices. (10)b. Check the answer you obtained in (a) by graphing the new Jnction p(x). Obtain a printout of the graph. Explain how you used your graphing calculator to verify that your answer is correct. (30)c. Verify algebraically that the two equations are equivalent