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Math Help - graphing

  1. #1
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    graphing

    I'm trying to graph:

    3cos[(pi/2x)+(6pi/5)] within the interval [8,-8],

    but I'm not getting the right answer when I plot the points. I have one of the points at (-2.4,3) and the rest of the graph should follow given I can only move one point on the graph and the rest of the graph will follow in accordingly
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  2. #2
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    Re: graphing

    Quote Originally Posted by jonathanraxa View Post
    I'm trying to graph:

    3cos[(pi/2x)+(6pi/5)] within the interval [8,-8],

    but I'm not getting the right answer when I plot the points. I have one of the points at (-2.4,3) and the rest of the graph should follow given I can only move one point on the graph and the rest of the graph will follow in accordingly
    Is your function \displaystyle \begin{align*} 2\cos{\left(\frac{\pi}{2}x + \frac{6\pi}{5}\right)} \end{align*} or \displaystyle \begin{align*} 2\cos{\left(\frac{\pi}{2x} + \frac{6\pi}{5}\right)} \end{align*}?
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  3. #3
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    Re: graphing

    My function is the first one function you put down. Sorry.
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