Graph at least one period of the function, and find the amplitude, period, and phase shift.

A. Graph at least one period of the function, and find the amplitude, period, and phase shift. 

B. Find an exact value of the y coordinate for the point (-π/4, ___) which falls on the graph of the given function

C. Find an exact value for the x coordinate of a point (___, 1) which falls on the graph of the given function.