20 Most Recent Texas Instruments TI-84 Plus Silver Edition Graphic Calculator - Page 9 Questions & Answers

Are you pressing just the comma key, or are you pressing the ALPHA key first? Do you have alpha lock turned on? Could you post the exact sequence of keystrokes and what it is you want to enter?

The calculator is programmed to round up oe down as the case may be. Just select the number of decimal digits you want to keep and the calculator will perform the necessary rounding.Open the MODE screen. On the line that says FLOAT select the number of digits. you want to keep.

Open the Matrix function by pressing 2nd [x^-1]>EDIT.Once Matrix is created, press [2nd][x^-1]>MATH>[1:det(] complete the matrix name and then press ENTER. If matrix is non-singular, you will get your answer.

Your TI-84 Plus displays the ERR:DIM MISMATCH error if you are trying to perform an operation that references one or more lists or matrices whose dimensions do not match. For example, multiplying L1*L2, where L1={1,2,3,4,5} and L2={1,2} produces an ERR:DIM MISMATCH error because the number of elements in L1 and L2 do not match

To type a letter of the alphabet, use the ALPHA keyboard. Press the ALPHA key followed by the letter you want.

Turn the calculator on. Press and release the 2ND key. Press and hold the Up-arrow key for a few seconds to darken the screen or the Down-arrow to lighten and see whether the screen becomes legible. If you go too far, repeat with the 2ND and the other direction arrow key.

Yes? What does the error message say? What are you doing when you get this message?

If you are lucky it may just be that the batteries are dislodged. Open battery compartment and and reseat the batteries. Try it.

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.

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.What do you mean by "changed the resolution"?

I am afraid you cannot do that with the TI83/84 Plus SE. The newer OS allows you to get results expressed as fractions, but not radicals. Sorry.

When calculating trigonometric functions you should pay attention to the angle unit used. The TI84 PLUS/SE can use two units: the radian and the degree, As to rounding I do not see why it would ruin your answers which are approximate anyway. Just choose float whithout specifying the number of decimal digits, then when a result is displayed round it yourself to the desired accuracy.To set the angle unit press MODE, then use down arrow to move highlight to the line RADIAN DEGREE and select the one you want.

Press ( 2 / 2 1 ) / ( 5 (-) 7 ) ENTER

I do not think that you can DELETE it, you probably just cleared the equation, just put another equation into Y=, and it will work.

otherwise, if you don't have any programs you need or so... just press 2nd +

Scroll down to reset, and press clear RAM

It's in the MATH NUM menu. Press MATH right-arrow 1. Alternatively, it's the first item in the catalog so you can get it by pressing 2ND CATALOG ENTER.

The cosecant of an angle is one divided by the sine of the angle. As an example, to calculate csc(2), press SIN 2 ) x^-1 or 1 / SIN 2 =

I heard reinstalling them enables them again