I have all my data entered and my graph is turned on, but for some reason, sin reg wont work and I get the error message singular mat...Can you tell me whats wrong? I have a TI-84 plus.

Re: I cannot get sinreg to work

Here are a few things to try.

First, I'd check whether the students put the data

into lists other than L1 and L2. If you do SinReg

with no arguments, the machine defaults to using L1

and L2.

Second, check degree versus radian mode.

Third, I have had problems in the past with SinReg

when the data were *too good*. I think a singular

matrix might be the culprit in a case like this, but I

doubt that's the problem here. If you think it might

be, try deleting every other data point and try the

regression again.

Posted on Mar 22, 2008

Make sure you have the angular mode set to radians. In degree, the graph of sine(x) is nearly a straight line for small values of x.

May 08, 2012 | Texas Instruments TI-Nspire CAS Graphing...

When drawing function graphs of type Y1=, the name of the independent variable should be X

For polar graphs r=.., the independent variable is theta, while for parametric graphs it is T

To enter the default independent variable, press the key marked [X,Theta, T] . It will type in the correct name.

For polar graphs r=.., the independent variable is theta, while for parametric graphs it is T

To enter the default independent variable, press the key marked [X,Theta, T] . It will type in the correct name.

Sep 18, 2011 | Casio FX-9750GPlus Calculator

To enter powers of trigonometric functions you must enclose the functions in parentheses and then apply the exponent to the whole. For example X1t =(sin T)^3 , Y1t=(cos T)^3 will give you a shape similar to a rhombus with concave sides. The symbol ^syands for the operation of raising to a power. The key is the one with the caret symbol ^ , and it is wedged between the xsqure and EXIT keys (third row of keys).

As regards the cotangent, use the equivalent definition cot(X)=1/tan(X).

As regards the cotangent, use the equivalent definition cot(X)=1/tan(X).

Jul 26, 2011 | Casio FX-9750GPlus Calculator

When you are entering the expression, do not use implied multiplication. For example if your expression contains x times sin(X), enter it as X*SIN(X), otherwise the calculator will look for a function XSIN and will not find it, giving you the error message. No need to enter the explicit multiplication sign if you have a number to the left of the function. Also be wary of entering X3 for 3 times X.

Apr 13, 2011 | Texas Instruments TI-89 Calculator

I was having the same problem. Whenever I hit the graph button after a linear function was entered in Y1 I would get a screen that said "ERR: INVALID DIM 1:Quit"

I messed with a lot of settings but ended up returning settings back to default. The thing that fixed the calculator's ability to graph was UN-highlighting the Plot1, Plot2, and Plot3 words. If they are white on black they are highlighted. If the words are black then they are UN-highlighted.

To UN-highlight Plot1, Plot2, Plot3, do this: move the cursor up to the highlighted Plot1 and hit "enter." Notice the difference? Now do the same to the others and see if it fixes your problem like it fixed mine.

good luck.

I messed with a lot of settings but ended up returning settings back to default. The thing that fixed the calculator's ability to graph was UN-highlighting the Plot1, Plot2, and Plot3 words. If they are white on black they are highlighted. If the words are black then they are UN-highlighted.

To UN-highlight Plot1, Plot2, Plot3, do this: move the cursor up to the highlighted Plot1 and hit "enter." Notice the difference? Now do the same to the others and see if it fixes your problem like it fixed mine.

good luck.

Dec 02, 2010 | Texas Instruments TI-83 Plus Silver...

your value is not within the domain of the function, that is why it's giving you that error message, try the value times -1, or -(your value)

May 01, 2010 | Texas Instruments TI-89 Calculator

A) IF YOU GET AN ERROR MESSAGE,

it might be worthwhile to let us know its contents. If you do get a message ( INVALID DIM) you should turn the statistical plots OFF.

To turn statistical plots off

B) IF YOU DO NOT GET AN ERROR MESSAGE

Usually as soon as you start entering an expression in the Y= editor screen, the = sign is highlighted to ensure the drawing of a function. However, if you have previously used the Transfm application to draw dynamic graphs, it takes over the graphing functionalities from the native OS and you can only draw a single graph.

The reason is that dynamic graphing needs one or two parameters that can be changed during the graphing process and the graph redrawn with a new value of a parameter, and you end up with a family of curves differing one from the other by the values of one parameters. But since the calculator has space for 10 graphs at most, only one function can be highlighted.

To make a long story short, you must Uninstall the Transfrm application from memory. The procedure will not erase it, just kick it out of memory.

Another potential culprit is the Inequalz App. To Uninstall it, do as for the Transfm and select the option that will unload it from memory.

it might be worthwhile to let us know its contents. If you do get a message ( INVALID DIM) you should turn the statistical plots OFF.

To turn statistical plots off

- Press [2nd][Y=] to open the (STAT PLOT) menu.
- Select [4:PlotsOff] and
- Press [ENTER].
- Calculator displays Done
- Restart your graphs.
- Adjust the window dimensions if necessary or use the ZOOM function to have all graphs displayed.

B) IF YOU DO NOT GET AN ERROR MESSAGE

Usually as soon as you start entering an expression in the Y= editor screen, the = sign is highlighted to ensure the drawing of a function. However, if you have previously used the Transfm application to draw dynamic graphs, it takes over the graphing functionalities from the native OS and you can only draw a single graph.

The reason is that dynamic graphing needs one or two parameters that can be changed during the graphing process and the graph redrawn with a new value of a parameter, and you end up with a family of curves differing one from the other by the values of one parameters. But since the calculator has space for 10 graphs at most, only one function can be highlighted.

To make a long story short, you must Uninstall the Transfrm application from memory. The procedure will not erase it, just kick it out of memory.

- Press the [Apps] key.
- Scroll down or up to reach the
Transfmapplication.
- Select it and press [ENTER].
- If that application
was running you will see a new screen that tells you some thing like

- Transfrm App
- 1:Uninstall
- 2:Continue

Press1:Uninstall.

Graphing functionalities will revert to the native OS

Another potential culprit is the Inequalz App. To Uninstall it, do as for the Transfm and select the option that will unload it from memory.

Jan 25, 2010 | Texas Instruments TI-84 Plus Silver...

This error show up when you are graphing out of the plot menu. If you are not graphing data points from list menu, you need to turn the plots off. In the y= screen, you will see the words plot 1, plot 2, etc across the top of the screen. If one of the plots is highlighted (black box over the words), you need to turn it off. This can be done by arrowing up and highlighting the box and pressing enter. When you arrow back down, the plot should be off and you will be able to enter an equation in the y= lines and graph.

If you are graphing from the plot menu, this error lets you know that one of the lists you are graphing is longer than the other.

Another way to fix the problem is to reset the calculator by pressing 2nd button then plus sign then 7 then 1 then 2. This will reset the calculator however if you are graphing from lists, your data will be erased. Hope this helps.

If you are graphing from the plot menu, this error lets you know that one of the lists you are graphing is longer than the other.

Another way to fix the problem is to reset the calculator by pressing 2nd button then plus sign then 7 then 1 then 2. This will reset the calculator however if you are graphing from lists, your data will be erased. Hope this helps.

Oct 02, 2009 | Texas Instruments TI-83 Plus Calculator

Hello,

I am no seer, nor will I try to guess what may have happened. This error may come from various conditions

1. The most common reason is an omitted right parenthesis. For instance you press the [sin] function key. It shows as sin( , notice the right parenthesis. You enter the variable, say X, and you press [ENTER]. The calculator gives you a syntax error: It does not know what to do as long as you do not insert the closing parenthesis.

2. Another common source of this error message is the use of the regular MINUS sign instead of the (-). The latter appears on the scren as a smaller, raised minus sign. This is especially true when you want to raise a number or a variable to a negative exponent.

Every function has one way it takes in its food (argument). If you don't do it the right way, it gives you an error. The nice thing is that the calculator gives you the opportunity to correct the error. Whenever you see Error 1:quit 2: Go to, choose GO TO because the calculator shows you exactly the symbol that is creating havoc: It will be highlighted.

Hope it helps.

I am no seer, nor will I try to guess what may have happened. This error may come from various conditions

1. The most common reason is an omitted right parenthesis. For instance you press the [sin] function key. It shows as sin( , notice the right parenthesis. You enter the variable, say X, and you press [ENTER]. The calculator gives you a syntax error: It does not know what to do as long as you do not insert the closing parenthesis.

2. Another common source of this error message is the use of the regular MINUS sign instead of the (-). The latter appears on the scren as a smaller, raised minus sign. This is especially true when you want to raise a number or a variable to a negative exponent.

Every function has one way it takes in its food (argument). If you don't do it the right way, it gives you an error. The nice thing is that the calculator gives you the opportunity to correct the error. Whenever you see Error 1:quit 2: Go to, choose GO TO because the calculator shows you exactly the symbol that is creating havoc: It will be highlighted.

Hope it helps.

Sep 15, 2009 | Texas Instruments TI-83 Plus Calculator

Hello,

Clear all ram

[2nd][MEM][7:Reset][1:All Ram].

To enter a function to graph ex: Y1=sin(x)

Press function key [Y=].

On first line where i says Y1= , enter the function [SIN][X,T,theta,n][)][ENTER]

Then press [GRAPH]

If graph is too flat adjust the window by pressing [WINDOW] and hoose different values for Xmin, Xmax, Ymin,Ymax.

Hope it helps.

Clear all ram

[2nd][MEM][7:Reset][1:All Ram].

To enter a function to graph ex: Y1=sin(x)

Press function key [Y=].

On first line where i says Y1= , enter the function [SIN][X,T,theta,n][)][ENTER]

Then press [GRAPH]

If graph is too flat adjust the window by pressing [WINDOW] and hoose different values for Xmin, Xmax, Ymin,Ymax.

Hope it helps.

Aug 22, 2009 | Texas Instruments TI-83 Plus Calculator

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