Question about Texas Instruments TI-89 Calculator

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How do I do 3D graphs on a TI-89?

I'm trying to graph e^xyz.
or if I could just do a function with x and y that would awesome.

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Hello,

First you must configure your calculator to perform 3D graphics
Press MODE
1.The first line shown is Graph. Unfold the hidden menu list with the right arrow and choose Graph 5:3D
2. Press ENTER to validate.

Now you must define the surface you want to draw
1. Press the [diamond] key then [Y=] to get a list of function names, the first of wich is z1
2. Enter the following function (or your own) z1=(x^3*y-y^3*x)/390
( x cubed times y -y cubed times x) divided by 390.
3 Press ENTER.

Graph the function
Press the [diamond] key then [GRAPH]

The graphing screen displays progess in %. When it is finished you will see a weird sombrero.

Hope it helps

Posted on Aug 22, 2009

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How do I stop my ti89 from dumping the programs in main when I open a APP

Posted on Aug 26, 2009

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1 Answer

How do you graph this equation r(t)=cos(t) * i + sin(t)* j + t *k (x,y,z)= (i,j,k) on a ti89


The calculator does not support 3D parametric functions, but there is a procedure that will help you do that. Here is the link to the page that describes it.

Jun 12, 2012 | Texas Instruments TI-89 Graphing Calc...

1 Answer

When I try to graph something, I see the graph, but I no longer see the x and y axis. This happened on my TI-89 titanium


Enter a function in Y= Editor, then draw its graph.

k24674_122.jpg

While the graph is still displayed Press F1

k24674_123.jpg

Press 9:Format to open the FORMAT screen
k24674_124.jpg

Toggle the Axes ON

Aug 26, 2011 | Texas Instruments TI-89 Calculator

1 Answer

I try to graph an absolute value on my Ti 89 and I put the inequality in right but when I go to graph it my calculator says undefined variable.


If you want to graph the absolute value of a function, feed the function to the absolute value ie graph y= abs(f(x)). The calculator will take care of it. See screen captures where I draw the function y1=x^3-5x^2-3 and y2='x^3-5x^2-3'. On the first graph the function is represented and on the second the function and its absolute value.

k24674_50.jpg

k24674_51.jpg

k24674_52.jpg

The calculator knows how to calculate the absolute value of an expression. The name of the command is abs(

k24674_53.jpg

May 08, 2011 | Texas Instruments TI-89 Calculator

1 Answer

I am trying to graph function x^2+y^2+4z=10


  1. In Home, Press the MODE button.
  2. On line Graph, use right arrow to unfold the graph menu and select 3D.
  3. Press [2nd][QUIT] to go back to HOME screen.
  4. Enter the [Y=] editor.
  5. On line z1= type in the expression (10-x^2-y^2)/4
  6. Press the appropriate key sequence to [GRAPH] (on my Voyage 200PLT, I press [diamond R]
  7. While graph is displayed you can press the F2 key to access the ZOOM functions.

May 04, 2011 | Texas Instruments TI-89 Calculator

1 Answer

I have a TI-89, I enter a function and then switch to graph. It shows nothing. I tried simple functions like y=x, y=2 and nothing.. It does show the X and Y axis only.


What probably happened is the graph was turned off. stealthnh.png to turn the graph back on, select the function (ex. y1) and then press f4. This should turn the graph back on and you should see the function.
Hope this helps.

Apr 20, 2011 | Texas Instruments TI-89 Calculator

1 Answer

Hi, I wonder how to use a TI89 to graph a multivariable functions's 3D picture. Thanks.


Hello,

First you must configure your calculator to perform 3D graphics
Press MODE
1.The first line shown is Graph. Unfold the hidden menu list with the right arrow and choose Graph 5:3D
2. Press ENTER to validate.

Now you must define the surface you want to draw
1. Press the [diamond] key then [Y=] to get a list of function names, the first of which is z1
2. Enter the following function (or your own) z1=(x^3*y-y^3*x)/390
( x cubed times y -y cubed times x) divided by 390.
3 Press ENTER.

Graph the function
Press the [diamond] key then [GRAPH]

The graphing screen displays progress in %. When it is finished you will see a weird sombrero.

Hope it helps

Mar 21, 2011 | Texas Instruments TI-89 Calculator

2 Answers

Deleting the 3D function


I heard of instructor disabiling APPS but, not functions. One reason I can't see that is I can download a program that does the same thing and hide it w/ instructor even knowing its there unless he ran a search in ever folder or open a lot of programs

Mar 24, 2009 | Texas Instruments TI-89 Calculator

2 Answers

I cannot plot graph in my Ti 89 graphing calculator


That means one (or more) of the variables you have in your function is not defined. Check to make sure you didn't misspell any variable name. Also, check to make sure you didn't run two variable names together. "ab" is the variable ab, not a times b.

Mar 19, 2009 | Texas Instruments TI-84 Plus Calculator

1 Answer

Graphing


go to the mode section and it will be the first option, you need to click on the mode button

Mar 31, 2008 | Texas Instruments TI-89 Calculator

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