Question

How do you graph `y = 2 cos(2πx)`?

Answer 1

A general cosine graph of form `y=AsinBx` has amplitude A which represents the maximum displacement from the rest position, and period `T=(2pi)/B` which represents the length on the x axis for 1 complete cycle.

So in this case `A=2 and T=(2pi)/(2pi)=1`

Hence the graph is drawn as follows :

graph{2cos(2pix) [-5.55, 5.55, -2.773, 2.776]}