Graphing cotangent is JUST like graphing tangent - except backwards! Our graph goes up towards positive infinity near the -90 asymptote and down to negative infinity near the 90 asymptote. This is literally the ONLY difference between tangent and cotangent. Starting point, ending point, and period are all the same.
Since this is pretty easy to grasp, we did some harder examples of cotangent graphs in class today. Click on the link below to view a video of one if you are confused!
http://www.educreations.com/lesson/view/graphing-cotangent/13607137/?s=rkTVsd&ref=app
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