Will need to create a array of x values to plot against. Something like x = 0:pi/4:4*pi;... Might need a tighter interval (middle value in equation) for a smoother plot so maybe pi/12 or smaller.
Will need to create two equations with those values: y1 = cos(x); y2=5+cos(x);
Use plot command with those arrays. 2 ways to do this:
1: plot(x,y1,x,y2);
2: plot(x,y1); hold on; plot(x,y2); This method is usually prefered for ease of changing line styles and colors.
Type "doc plot' into command window and hit enter for more information on line styles and colors
lastly just use ylim([-2,7]); to change the limits of the graph.
hold on makes sure it plots on the same graph without erasing previous plotting.
