Question about Texas Instruments TI-89 Calculator

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How do i graph a vertical line (i.e. x=1) on a TI-89?

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Press the 'Home' button, then press 'Catalog'. Scroll down to 'LineVert', press 'Enter'. Now enter a number for your vertical line, then press 'Enter' again.

Posted on Dec 13, 2011

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2 Answers

My ti-89 titanium won't graph logarithms (y1=22log(10)x)


The graph of y=22log(10) is a straight line, though it should go through (0,0) and (1,22). Log(10) is a constant 1, so the function is simply y=22x .

If you want "twenty-two times log-base-ten of x", write it as 22*log(x) .

Aug 11, 2012 | Texas Instruments TI-89 Calculator

2 Answers

I have a TI-89 Titanium. How do I graph a function containing a cubed root?


For example y=x^(1/3)-x+1. Type this function and then graphing it!
See captured images

12_7_2011_10_52_19_pm.jpg

12_7_2011_10_52_37_pm.jpg

Sep 14, 2011 | Texas Instruments TI-89 Calculator

1 Answer

I just got my sister's TI-89 calculator and I don't know how to use it. I'm trying to find out how to graph a non-linear inequality. Any ideas?


You can download the manual from the manufacturer's web site at
http://education.ti.com/calculators/downloads/US/Guidebooks/Detail?id=6128

There's also an aftermarket book:
http://www.barnesandnoble.com/w/ti-89-graphing-calculator-for-dummies-c-c-edwards/1013991784?ean=9780764589126&itm=1&usri=ti%2b89%2bdummies
If you're lucky, a local library will have it.


http://www.barnesandnoble.com/w/
ti-89-graphing-calculator-for-dummies-c-c-edwards/1013991784

Aug 23, 2011 | Texas Instruments TI-89 Calculator

1 Answer

When graphing the function (x+6)/(x-7) I'm getting a vertical line showing up on the graph connecting the two curves that shouldn't be there. do I have something turned on that shouldn't be?


The vertical line is called an asymptote, it is not connecting the graph, it means that the function goes to infinity as the function nears the line. In this case the graph goes to infinity and negative infinity as the x nears 7. This is because the function becomes undefined at x = 7 , plug 7 into x and we get 1/0, dividing by zero is undefined. Thus, the calculator puts the vertical asymptote in the graph to symbolize the action of the function nearing infinity.

Apr 02, 2011 | Texas Instruments TI-83 Plus Calculator

1 Answer

All trig-based graphs give me weird results on my TI-89 Titanium. Taking y=sin(x) for instance, I get a clean diagonal line through the point (0,0), almost resembling the graph y=x with window xmin = -10...


You have your angular mode set to degrees. Ten degrees is about 0.17 radians, and for small x: sin(x) is nearly equal to x. Thus, sin(x) from -10 to 10 is indeed nearly a straight diagonal line.

Press MODE, then scroll down to "Angle" to change the angular mode.

Jun 03, 2010 | Texas Instruments TI-89 Calculator

2 Answers

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


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

Jul 18, 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

Graph a cubed root fuction on ti-89


Hello,
Here it is
[Diamond][Y=] enter y1=(2-X)^(1/3)
[Diamond][GRAPH]

30831a2.jpg

Hope you liked the graph

Mar 17, 2009 | Texas Instruments TI-86 Calculator

1 Answer

Ti-89 help


You create a program by using the program editor. Press the "APPS" key and select "Program Editor".

What type of data graph do you want? The TI-89 can plot Scatter, XYline, Box, and Histgram graphs. Use the "Plot Setup" screen to select the desired plot type.

Apr 17, 2008 | Texas Instruments TI-89 Calculator

1 Answer

Graphs


From the Y= editor:

1. Move the cursor to highlight the applicable function.

2. Select the Style menu and press 2nd F6.

3. Select the applicable style.

In this case you want Dot. The other choices are Line, Square, Thick, Animate, Path, Above, and Below.

For full details look in the section "Basic Function Graphing" in the TI-89 Guidebook.

Apr 01, 2008 | Texas Instruments TI-89 Calculator

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