Question about Texas Instruments TI-89 Calculator

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I´d like to get 99 answeres instead of the default 30 in home win

I´d like to get 99 answres instead of the default 30(I think) in home window.

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When on the home screen, simply hit [F1] to get to the tools drop down menu. Either scroll down to format or hit [9]. Then a box will come up displaying the number of history reports. Simply hit the right key [>] and change the number to any interval of 10, up to 99. Then hit [ENTER] [ENTER] and you should be good...

Posted on Dec 27, 2008

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Round 105,099 to nearest thousand


The question basically is whether 105,000 becomes 106,000 or not.
It would not round down below 105,000 because it is already higher than that. So we concentrate on the "tail" of the number 105,099 and ask whether 099 (essentially 99 more than 105,000) is more than half way towards 106,000. In order to do that, the "tail" would have to be at least 500 (i.e., half way towards 106,000) as in 105,500. Because 99 is less than 500 the answer is no, the "tail" is not big enough to round up the number 105,099 to 106,000. The answer to rounding 105,099 to the nearest thousand is that because the "tail" is less than half way towards 106,000, the number would instead would round down to 105,000.

Nov 05, 2014 | Calculators

1 Answer

How to get a radical in an answer


This calculator does not display results as radicals.

Jan 14, 2014 | Texas Instruments TI-30 XIIS Calculator

2 Answers

My Ti-84 plus silver is giving me wrong answer when I use normalcdf. I used video guide to make sure my entries were correct. lower:280 upper: 1E99 mu:272 sigma:9 I get answer .81296 the video and correct...


That is what I get with your numbers on the TI84 Plus Silver Edition 0.1870313608. I get the same on the TI83 Plus. What can I say?. Apart from an error entering the numbers ( a 6 for a 9, a 3 for an 8) I cannot think of anything else. Sorry.

Oct 26, 2013 | Texas Instruments TI-84 Plus Silver...

1 Answer

I keep getting 0 for an answer when I input .06785^160?


The answer (0.06785^160= 1.117E-187, or 0.0005^160= 6.842E-529) is much too small to be displayed on normal scientific calculators, where the exponent is usually limited to -99.

Try using the Windows calculator (in scientific view) instead. It can usually be found at Start/All programs/Accessories.

Nov 20, 2011 | Casio FX-300MSTP Scientific Calculator

1 Answer

Fx-115es Help if I input 1.5-.5 it gives correct answer "1"continue with answr*25.4 it gives me 645.16 not "25.4"? It seems to handle whole numbers correctly like 5-4


It seems to me that it is doing its calculations correctly: 645,16 happens to be just the square of 25.4. Which makes me believe that you must have pressed the square key (maybe you did not notice).

Aug 27, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

If an archer has 30% possibility of hitting a bull's eye; how many times should he try to have a 99% chance?


Think about the problem the other way. The archer has a 70% chance of missing the bull's eye with any one shot. The odds of missing the bull's eye with both of two shots is .7*.7=.49. The odds of missing with all three shots is .7^3. So, how many shots must the archer take so that the odds of missing with all of them are less than .01?

Playing around with logarithms gives us log n = log .01 / log .7 or
n = 10^(log .01 / log .7)

Putting this into the calculator (you didn't specify the make and model, so I can't give you the exact keystroke sequence) gives a value of about 12.9 for n. Thus the archer should take at least 13 shots in order to have a 99% chance of getting at least one bull's eye.

The same answer comes out if you use natural logs instead of common logs.

May 09, 2011 | Calculators

2 Answers

Why won't my sharp EL 531W give me the correct answer for SIN e.g SIN 30 should = 0.5 but my calculator gives me 0.453990


Your calculator is set for GRAD instead of DEG, it means that it takes your input in gradian instead of degrees. You should press the DRG button until it displays DEG instead of GRAD.

Mar 15, 2011 | Calculators

2 Answers

I'm trying to graph a line. For the


Hello,
Reset the memory to defaults and you will not get the error.
[2nd][MEM][7:Reset][Defaults] [2:Reset] [ENTER]. Press [CLEAR] and them [Y=] to enter the function. No need to set Zoom. Defaults work fine for y1= 4X+3.
Press [GRAPH].
Hope it helps

Sep 26, 2009 | Texas Instruments TI-83 Plus Calculator

2 Answers

"Err: Domain"


I think you may find arcsin(x) is equivalent in older nomenclature to sin^-1 (x)...ie use the "2nd" and the SIN key instead of typing arcsin.
eg. arcsin(0.5) is 30 degrees is the same as sin^-1(0.5)
The ^-1 does not mean reciprocal, but "the angle whose sin is." Here the minus one indicates a kind of inverse operation. The word arcsin indicates that same inverse.

Mar 23, 2009 | Texas Instruments TI-89 Calculator

1 Answer

Home screen


download flib from the internet and send it to ur gc.
type flib("slrcl") in your home screen
press F1 8
Try again if it works

Jun 08, 2008 | Texas Instruments TI-89 Calculator

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