20 Most Recent Texas Instruments TI-82 Calculator Questions & Answers

The TI82 is a bit old Technology and if you did not use for a few years the screen is dead its a common problem with this model and the TI83
sorry for not been a big help

Texas... | Answered on Feb 09, 2019

5/3 cannot be represented exactly. Break it up into two parts, (-8)^5 then take the cube root. Be aware that their are three roots.

Texas... | Answered on Apr 06, 2017


Texas... | Answered on Mar 17, 2015

The calculator has three display formats for results: Normal, Scientific, and Engineering. It is possible that your calculator is configured to display results in Scientific Format.
Press the MODE button. On the first line, highlight Normal. After that you can use the Down Arrow to move cursor to the second line and highlight FLOAT.

Texas... | Answered on Feb 21, 2015

There is no reset button. Just clear the memory.

Texas... | Answered on Jul 15, 2014


Texas... | Answered on Jun 12, 2014

Press 8 . 2 3 2nd [EE] (-) 6

Texas... | Answered on Jun 01, 2014

weak battery, or loosen display.....
change battery.... if doesn't help,. open device and check screews that are holding display, if it's loosen, tight it up

Texas... | Answered on Apr 25, 2014

What type of plot? Try turning off the stat plot features.

Texas... | Answered on Dec 03, 2013

Turn the calculator on, press and hold the 2nd button, then press the up-arrow button to increase the contrast or the down-arrow button to decrease the contrast. If you go too far, release both buttons, press and hold the 2nd button, and press the appropriate arrow button.

Texas... | Answered on Nov 28, 2013

To access the inverse cosine function, press 2nd COS.

Texas... | Answered on Oct 13, 2013

There isn't one. There are, however, several buttons that bring up various sub-catalogs, such as MATH, MATRIX, PRGM, STAT, and VARS.

Texas... | Answered on Oct 09, 2013

I am not sure I understand but if it the same problem as in your other posted question, here is what I wrote.

Are the data in L1 and l2 in any way related? If they are (being x-values and y-values of some data set) then you need to do regression analysis (2-var stats)
If they are not related (connected) you can calculate the mean of each group separately.
Do 1-var stat by specifying the L1 list first (may be the default), get your average of the values in L1. Then you can do 1-var stat on the data in L2 by specifying the list L2 on the command line.
1-var L2 ENTER
Note: What I am describing here is valid for the TI 83 Plus/TI84 Plus, but I suspect the steps are similar to the TI 82.

Texas... | Answered on Oct 08, 2013

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