Question about Texas Instruments TI-89 Calculator

You might have used an inappropriate variable name.

For functional graphs y=F(x), the independent variable must be X

For parametric graphs, the independent variable in the x_t and y_t functions must be t.

For polar graphs the independent variable must be Theta, and for sequence graphs, it must be the special wiggly n.

Once you select the type of graph, the independent variable is entered by pressing the key marked**X,T, Theta, n**.

For functional graphs y=F(x), the independent variable must be X

For parametric graphs, the independent variable in the x_t and y_t functions must be t.

For polar graphs the independent variable must be Theta, and for sequence graphs, it must be the special wiggly n.

Once you select the type of graph, the independent variable is entered by pressing the key marked

Dec 19, 2013 | Calculators

At first type next: Home, then 2nd F6: 2 option NewProb.

Then graphing function, for example y=-x^2+28x+6

Then graphing function, for example y=-x^2+28x+6

Sep 01, 2011 | Texas Instruments TI-89 Calculator

Do you have a function somewhere (not necessarily y1) that is attempting to graph. You can check this by going into the Var-Link menu (2nd MINUS) and searching for a function variable. If that doesn't work check the function you're trying to graph and see if it has a variable in it that is supposed to be a multiplication (xy instead of x*y) or if somehow the variable you meant to use got deleted

Aug 08, 2011 | Texas Instruments TI-89 Calculator

From the alpha keyboard type in NewProb and press ENTER.

This will clear the contents of all the one-letter variables a-z.

Open the Y= editor and type in an expression for the function to draw.

You do not have to enter a multiplication sign between a numerical factor preceding the variable x and x. If a factor is a letter you must explicitly use the multiplication sign.

Press the key sequence to draw the graph.

This will clear the contents of all the one-letter variables a-z.

Open the Y= editor and type in an expression for the function to draw.

You do not have to enter a multiplication sign between a numerical factor preceding the variable x and x. If a factor is a letter you must explicitly use the multiplication sign.

Press the key sequence to draw the graph.

Aug 01, 2011 | Texas Instruments TI-89 Calculator

function or run a user-defined program that references a local variable that is not

initialized (assigned a value). You have to type

May 02, 2011 | Texas Instruments TI-89 Calculator

I''m glad you got this to work. For anyone else with this problem, in the y = page you can go to f5 and reset the settings, or you can highlight the plot 1 line and press [clear] this will not clear any other settings you may have inputted.

Mar 11, 2011 | Texas Instruments TI-89 Calculator

Hello,

The default variable for the integral is x. If you have a product between two litteral symbols the * must be inserted. Arguments of functions must be enclosed between parentheses. To avoid errors clear the variables before the integration: [2nd][F6:Clean Up] [2:NewProb][ENTER]ENTER]

Hope it helps.

The default variable for the integral is x. If you have a product between two litteral symbols the * must be inserted. Arguments of functions must be enclosed between parentheses. To avoid errors clear the variables before the integration: [2nd][F6:Clean Up] [2:NewProb][ENTER]ENTER]

Hope it helps.

Sep 30, 2009 | Texas Instruments TI-89 Calculator

Go to Window and make sure there are acceptable values for your graph, default is usually 10 and -10 with 1 scale.

Jul 06, 2009 | Texas Instruments TI-83 Plus 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

Did you still need help with this? My suspicion is a missing multiplication sign. Sometimes you need to be very explicit in what you want the calculator to do. Have you tried sqroot(sin(2*theta)) explicitly putting the multiplication symbol in there? I think 2theta is interpreted as it's own variable name...

Jan 11, 2009 | Texas Instruments TI-89 Calculator

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