Texas Instruments TI-82 Calculator - Answered Questions & Fixed issues

There's a cube root function in the MATH menu. Press the MATH key and it should be item 4.

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.

http://www.wikihow.com/Calculate-the-Product%E2%80%93moment-Correlation-Coefficient

Press MODE then select "Normal" from the top line.

Press MODE then select "Normal" on the top line.

There is no reset button. Just clear the memory.

135-72i

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

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

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

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.

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

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

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 ENTERNote: 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.

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 ENTERNote: 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.

What happens when you use the decimal point (".") instead of the comma (",")?

TI calculators have an annoying habit of dimming the screen when the batteries are changed so that it appears as if the calculator isn't turning on. Turn the calculator on (or at least press the ON key). Press and release the 2ND key. Press and hold the Up-arrow key for a few seconds and see whether the screen becomes legible.

The -0.7568 value is the correct result for the sine of 4 radians. To switch the calculator to degrees, press MODE, use the cursor keys to move down to the Rad/Deg line, highlight "Deg", press ENTER then 2nd [Quit].

ERR: STAT PLOT meaning tha you are trying to display a graph when there is a StatPlot On that uses an undefined list

Use the nPr command in the MATH PRB menu.Press 9 MATH left-arrow 2 3 ENTERThe 9 comes from the fact that "clipboard" has nine letters.