Thread: Graphing trig functions

I need to graph y=2 cos x over intervals [-2pi,2pi]. I am using a TI 83 plus and do not remember how to change the intervals. I know what the graph is supposed to look like from looking at the answer in the back of the book but what I am getting is different.

Originally Posted by jasons

I need to graph y=2 cos x over intervals [-2pi,2pi]. I am using a TI 83 plus and do not remember how to change the intervals. I know what the graph is supposed to look like from looking at the answer in the back of the book but what I am getting is different.

window menu ...

xmin = -2pi
xmax = 2pi

perform a "zoom fit" (zoom 0)