+118723 You should know what y=cosx looks like
That is your starting point
$$y=4cos(n\theta)+1
the amplitude is 4
The period is 2\pi/n
\mbox{ The 1 on the end mean that the whole graph is raised 1 unit }
\mbox{ so instead of it being centred on the x axis (y=0) it is centred on y=1}$$
+118723 Chris, how are you entering attachments - are they straight off the net?
+118723 You should know what y=cosx looks like
That is your starting point
$$y=4cos(n\theta)+1
the amplitude is 4
The period is 2\pi/n
\mbox{ The 1 on the end mean that the whole graph is raised 1 unit }
\mbox{ so instead of it being centred on the x axis (y=0) it is centred on y=1}$$
