If the graphing window is not to your liking, you can use any of the Zoom commands. If your Tstep is small enough, you should be able to see the graph develop. Your calculator begins graphing by substituting the smallest T value in the interval. You have done all the heavy lifting this step is easy. As a general rule of thumb, the default value of the TStep is usually a good balance between graph accuracy and the time it takes to graph. The drawback is as the step gets smaller, your calculator takes longer to graph your parametric equations. As a general rule of thumb, the smaller your step is, the more accurate your graph is going to be. How do you decide the size of Tstep? Tstep is the increment that your graph uses to plot each point in creating the graph you see on the screen. What do the T values affect? The maximum and minimum T values affect how much of the graph you see.
You would have to change the minimum and maximum values of X and Y to change the graphing window. So, identifying Tmin and Tmax is pretty easy for this problem. Specifically, three window settings tend to cause problems: Tmin, Tmax, and Tstep. In fact, if my students are having trouble graphing parametric equations, it is usually because of the way they have set up their window. This adds a new dimension to your graph! Setting the window in Parametric mode is a crucial step in graphing parametric equations. Using parametric equations enables you to investigate horizontal distance, xand vertical distance, ywith respect to time, T.
Parametric equation to cartesian calculator plus#
Anything that can be graphed in Function mode on the TI Plus an also be graphed as a set of parametric equations.
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