Show all work. For the function y = cos[ x + pi/4]

A. Graph at least one period of the function.

B. Find the amplitude, period, and phase shift.

C. Find two exact points on the graph of the function, the first point when x is -2, and the second point when y is 1/2. (No decimal approximations.) The amplitude is __________ The period is ___________ The phase shift is ________ Two points on the graph are: (-2, ____) and (___, 1/2).