Chapter 4 - Section 4.5 - Graphs of Sine and Cosine Functions - Exercise Set - Page 596: 59

Please see below.

Please note that the graph of the function $y=-3 \cos 2\pi x +2$ (the red graph) is the graph of the function $y=-3 \cos 2\pi x$ (the blue graph) shifted up two units. The period of the graph is $\frac{2\pi }{2\pi }=1$.