Expanded Capabilities of the Newer TI-84 Calculators

Content: This page gives explains the added capabilities of the TI-84 Silver Edition and those with OS 2.55 or higher.

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© 2011 Frank Kizer

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Purpose:

of working with fractions, matrices, some calculus functions, a few additions to the MATH menu, and the Stats Wizard.

__ General: __ The TI-84 Silver Edition and those older TI-84
calculators that have been upgraded to OS 2.55 have several capabilities

that the TI-83 Plus and the older TI-84 calculators do not have. If you use your calculator frequently, and you have one

of the older TI-84 calculators, you may find it worthwhile to download and install the newer OS. The installation can be done

with the TI Connect software, which is available from the TI Website, and the USB cable that came with your calculator.

__ New Additions:__ The new features offer some new methods of
working with fractions and a STAT WIZARD that makes it

unnecessary to remember the syntax for the functions under the menus DISTR, DRAW, and STAT> CALC. There are

additional functions associated with the F-1 through F4 keys. Some of these functions are also under the MATH menu.

**Using the Stat Wizard:**

a) Press MODE and scroll down to STAT WIZARD and press ENTER to
activate the Stat Wizard.

b) Suppose you want to use normalcdf(. Pess 2ND, DISTR and
a screen such as the following Figure 1 will appear.

**Figure 1. Stat Wizard with data entered.
**The figure already has data entered. You will need to
enter your own. Enter your own data; then move the cursor to

highlight Paste and press ENTER. The expression Normalpdf(-1E9,30, 25, 4.5) will be pasted to the home screen with

the data in the figure. Press ENTER and the answer will be given. The other functions are done similarly.

__ Activating the Fraction Functions:__ Press MODE and
highlight MATHPRINT and press ENTER. Now, select your preferred

format for displaying numbers greater than 1. The entry u/d (number 1) will set up a format for entering a proper or improper fraction;

Un/d operates similarly for a mixed number (number plus fraction).

You will probably use this for multiplying numbers other than whole numbers. Incidentally, all four of the functions displayed in

Figure 1 below, are also in the MATH>NUM menu.

Of course, you can also use these operations in tandem.

1. Suppose you want to convert 3.125 to a mixed number.

a) First enter 3.125; then press ALPHA, F1. The screen in Figure 2 will appear.

in MATHPRINT.

2. Now suppose we want to multiply 1/3 *1/4 in MATHPRINT

a) Press F1, 1 and blank spaces for entering the numbers will appear.

b) Press 1, press right arrow, press 3, right arrow to enter 1/3.

c) Press x (the multiply sign), ALPHA, 1.

d) Press 1, left arrow, 4, left arrow, ENTER. The answer, 1/12 will appear in MATHPRINT.

3. You can also convert between fractions and decimals and the reverse using item 4 on that

same menu. Just enter the decimal such as 0.0625, press F1, 4, ENTER and 1/16 will be displayed.

the derivative at a point, value of the definite integral over a selectable range, and the logarithms to any

base. Doing log base 2 of 1024 is done as follows:

a) Press ALPHA, F2 and select 5. The log format will be set up for number entry.

b) Press 2, right arrow, 1024, right arrow; then press ENTER to get the value 10.

and forth between menus. The F3 key makes that somewhat faster. Suppose we want to

solve the system of linear equations:

2x-3y=12

-2x+y=-4

a) Press 2ND, MATRIX, move the cursor to MATH, and press ALPHA, B to display rref(.

b) Press ALPHA, F3 and the Select 2 rows and 3 columns then highlight OK and press ENTER.

c) In the zero matrix that is displayed, overwrite the zeros with 2, -3, 12, -2, 1, -4 being sure to press the right arrow after

each entry rather than the ENTER key. After the last entry press the right arrow once more.

d) Press ENTER and the answer will be displayed.

NOTE: You can always go back using the left arrow until ENTER is pressed. If you find you made

and error after pressing ENTER, just press 2ND, ENTER to display the whole entry and edit your

error.

F4 is useful for printing the Y-variables on the home screen, and perhaps more useful for printing

them in the Y= screen. Suppose that you want to graph y =± √(x-3).

a) Enter the positive expression in Y1. Be sure to press the right arrow after you're finished.

b) Move the cursor to Y2, press - (the negative sign), ALPHA, F4, highlight Y1 and press ENTER.

c) Press GRAPH and both the + and - expressions will be graphed.

*Released: 9/10/12 Revised: 4/17/13*