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Math Help - limits

  1. #1
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    limits

    Hi I have to present this math problem in front of my entire math 101 course and I have no idea on how i should present it. the question is this:

    Use a graphing utility to graph the function and approximate the limit. Write an approximation that is accurate to three decimal places.

    Lim of (1-cos 2x) / (x) as x approaches 0

    How should i go about using my graphing calculator to demonstrate?
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  2. #2
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    First thing, you will need to be able to project the graphics calculator interface onto a screen, so you will need the calculator's projector screen and a projector, or have the software installed on your laptop and project your laptop.

    Then, why not just show them the graph, explain to them that it looks like as you approach the point x = 0 from the left, it approaches the same point from the right.

    An alternative (or a supplement) is to use a table and evaluate the function at points closer and closer to x = 0 from both the left and the right. Discuss what it appears the function is tending to.
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