How To Put Inequalities On A Ti-84 Plus

You tin can enter and then graph parametric equations in your TI-84 Plus calculator. Parametric equations are used in Pre-calculus and Physics classes as a user-friendly way to define x and y in terms of a third variable, T. If you lot are familiar with the graphing function on your TI-84 calculator, then parametric equations shouldn't exist too much of a claiming for you.

Changing the mode

You tin't brainstorm graphing parametric equations until you change the mode of your calculator. Follow these steps to alter the mode of your computer:

1. Press [Style] and put the reckoner in Parametric mode.

   To highlight an item in the Mode carte, use the arrow keys to place the cursor on the item, and then press [ENTER]. Highlight PARAMETRIC in the fifth line to put the calculator in Parametric manner. See the first screen.

   It is normally a good idea to put your computer in Radian mode when working with parametric equations.

   

2. Press [2d][ZOOM] to access your Format menu.

   Make certain the ExprOn and CoordOn are both highlighted. These settings are helpful when performing a trace on your equations. See the second screen.

Selecting the graph fashion

All the functionality that you lot are used to having in Part manner is besides available in Parametric mode. If you would like to customize your graph past changing the color or the line mode, follow these steps:

1. Press [Y=] to admission the Y= editor.

2. Printing the left-arrow key to navigate your cursor to the left of the equal sign.

   See the first screen.

   

3. Press [ENTER] and use the left- and right-arrow keys to change the color using the spinner card.

   Run into the second screen.

4. Press [ENTER] and apply the left- and correct-arrow keys to change the line style using the spinner bill of fare.

   See the tertiary screen.

5. Press [ENTER] twice to make the changes effective.

Entering parametric equations

If you are paying attention, and so you may have noticed the Y= editor looks quite dissimilar than you may be used to. It seems like Y₁ has been replace with two equations, X_1T and Y_1T! Remember, the x and y variables are now defined in terms of a new parameter, T. When yous press

in Parametric style, a T appears instead of an x.

Ordinarily, y'all are given a pair of parametric equations to graph with an interval for T. For this practise, use these parametric equations: x(T) = 8sin(T) and y(T) = 4cos(T), where

1. Press [Y=] to access the Y= editor.

2. Enter X_1T = 8sin(T).

   Be sure to printing

   

   for T. See the first screen.

   

3. Enter Y_1T = 4cos(T).

   See the second screen.

   Press [ALPHA][TRACE] to access the Y-VAR carte du jour. Your estimator has a customized Y-VAR menu so that you can enter variables like X_1T or Y_1T in your parametric equations. Run into the 3rd screen.

About This Article

About the volume authors:

Jeff McCalla is a mathematics teacher at St. Mary's Episcopal School in Memphis, TN. He cofounded the TI-Nspire SuperUser group, and received the Presidential Award for Excellence in Science & Mathematics Teaching. C.C. Edwards is an educator who has presented numerous workshops on using TI calculators.

This article can be constitute in the category:

• Graphing Calculators ,

Source: https://www.dummies.com/article/technology/electronics/graphing-calculators/how-to-enter-parametric-equations-in-the-ti-84-plus-160668/

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