# How to plot the graph of y = cos pi x ?

The plot is as follows

graph{cos(pi*x) [-10, 10, -5, 5]}

Feb 20, 2016

The period of cos kx is 2$\pi$/k. So, the period of cos 2x is 2.The amplitude is 1.
y: 1 0 $-$1 0 1