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Math Help - Graphing trig functions

  1. #1
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    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.
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  2. #2
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    Quote Originally Posted by jasons View Post
    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)
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