How to Graph Parametric Equations on Ti-84: a Comprehensive Guide

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Written By ahmedjem7

If you are a student or a professional who deals with math and science, then you know the importance of graphing. Graphs are not only visually appealing but also provide an easier way to understand complex concepts. However, graphing parametric equations can be challenging, especially if you are new to it. But don’t worry, we are here to help.

In this article, we will walk you through the process of graphing parametric equations on TI-84. We will start with the basics and gradually move towards more advanced concepts. So, let’s get started.

Understanding Parametric Equations

Before we dive into how to graph parametric equations on TI-84, it’s important to understand what parametric equations are. A parametric equation is a set of equations that defines a relation in terms of one or more parameters. In simpler terms, it’s a way of defining a curve using two separate equations – one for the x-coordinate and one for the y-coordinate.

For example, let’s consider the parametric equations x = cos(t) and y = sin(t). Here, t is the parameter, and it can take any value between 0 and 2π. When we plug in different values of t, we get different points on the curve. Plotting these points will give us the graph of the parametric equation.

Setting Up TI-84

Now that we understand what parametric equations are let’s move on to setting up the TI-84 calculator to graph them. Follow these steps:

  1. Turn on the calculator by pressing the “on” button.
  2. Press the “mode” button.
  3. Use the arrow keys to select “parametric” and press enter.
  4. Use the arrow keys to select “radian” and press enter.
  5. Press the “y=” button.
  6. Enter the parametric equations in terms of “t” by using the “x,t,θ,n” key to input “t.”
  7. Press the “zoom” button and select “ZoomFit.”

Your calculator is now ready to graph parametric equations.

Graphing Parametric Equations on TI-84

Now that we have set up the calculator let’s move on to the actual graphing. Here are the steps:

  1. Press the “2nd” button and then the “trace” button to access the “calculate” menu.
  2. Select “intersect” and press enter.
  3. Move the cursor to the first curve and press enter.
  4. Move the cursor to the second curve and press enter.
  5. Move the cursor to “guess” and press enter.
  6. Repeat steps 3-5 for other intersection points.
  7. Press the “2nd” button and then the “graph” button to view the graph.

Congratulations, you have successfully graphed parametric equations on TI-84.

Tips and Tricks for Graphing Parametric Equations on TI-84

Here are some tips and tricks to help you graph parametric equations on TI-84 more efficiently:

  1. Use the “trace” function to find specific points on the curve.
  2. Use the “zoom” function to adjust the scale of the graph.
  3. Use the “window” function to adjust the range of the x and y-axis.
  4. Use the “table” function to generate a table of values for the parametric equations.


Graphing parametric equations on TI-84 can seem daunting, but with the right approach and knowledge, it can be done efficiently. By following the steps outlined in this guide, you can easily graph parametric equations and better understand complex mathematical concepts. Remember to experiment with different functions and use the tips and tricks mentioned to get the most out of your calculator. Happy graphing!


Can I graph parametric equations on TI-83?

Yes, you can also graph parametric equations on TI-83 by following similar steps.

What if my parametric equations involve more than one parameter?

If your parametric equations involve more than one parameter, you will need to input them as separate functions in the calculator.

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