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Page 1

TI-30X ×B

and

TI-30X ×S

Scientific Calculators

© 1999 Texas Instruments Incorporated

General Information

Examples: See the last page of these instructions for

keystroke examples that demonstrate many of the

TI-30X Ö functions. Examples assume all default settings.

& turns on the TI-30X Ö. % ' turns it off and clears

the display.

APD™ (Automatic Power Down™) turns off the TI-30X Ö

automatically if no key is pressed for about 5 minutes.

Press & after APD. The display, pending operations,

settings, and memory are retained.

2-Line Display: The first line (Entry Line) displays an entry

of up to 88 digits (or 47 digits for Stat or Constant Entry

Line). Entries begin on the left; those with more than 11

digits scroll to the right. Press ! and " to scroll the line.

Press % ! or % " to move the cursor immediately to

the beginning or end of the entry.

The second line (Result Line) displays a result of up to 10

digits, plus a decimal point, a negative sign, a “x10”

indicator, and a 2-digit positive or negative exponent.

Results that exceed the digit limit are displayed in Scientific

Notation.

Indicator

Definition

2nd

2nd function.

HYP

Hyperbolic function.

FIX

Fixed-decimal setting.

SCI, ENG

Scientific or Engineering Notation.

STAT

Statistical mode.

DEG, RAD,

GRAD

Angle mode (degrees, radians, or

gradients).

K

Constant mode is on.

x10

Precedes the exponent in Scientific or

Engineering Notation.

º »

An entry is stored in memory before and/or

after the active screen. Press # and $ to

scroll.

¹ ¸

An entry or menu displays beyond 11 digits.

Press ! or " to scroll.

2nd Functions: % displays the 2nd indicator, and then

selects the 2nd function (printed above keys) of the next

key pressed. For example, % b 25 E <

calculates the square root of 25 and returns the result, 5.

Menus: Certain TI-30X Ö keys display menus: z,

% h, L, % t, u, % w,

H, I, =, % k, % d, % ‚, and

% .

Press ! or " to move the cursor and underline a menu

item. To return to the previous screen without selecting the

item, press -.

To select a menu item:

¦ Press < while the item is underlined, or

¦ For menu items followed by an argument value, enter the

argument value while the item is underlined. The item and

the argument value are displayed on the previous screen.

Previous Entries

# $

After an expression is evaluated, use # and $ to scroll

through previous entries, which are stored in the TI-30X Ö

mode. You can edit a previous entry and press < to

evaluate the new expression.

Last Answer

%i

The most recently calculated result is stored to the variable

Ans. Ans is retained in memory, even after the TI-30X Ö is

turned off. To recall the value of Ans:

¦ Press % i (Ans displays on the screen), or

¦ Press any operations key (T, U, F, etc.) as the first

part of an entry. Ans and the operator are both displayed.

Order of Operations

The TI-30X Ö uses EOS

é (Equation Operating System) to

evaluate expressions.

1st

Expressions inside parentheses.

2nd

Functions that need a ) and precede the argument,

3rd

Fractions.

4th

Functions that are entered after the argument, such

5th

Exponentiation (^) and roots (x

‡).

6th

Negation (

M).

7th

Permutations (nPr) and combinations (nCr).

8th

Multiplication, implied multiplication, division.

9th

Addition and subtraction.

11th < completes all operations and closes all open

parentheses.

Clearing and Correcting

-

Clears an error message.

Clears characters on entry line.

Moves the cursor to last entry in history

once display is clear.

J

Deletes the character at the cursor.

Deletes all characters to the right when

you hold down J; then, deletes 1

character to the left of the cursor each

time you press J.

% f

Inserts a character at the cursor.

% {

Clears all memory variables.

% t

CLRDATA

Clears all data points without exiting

STAT

mode.

mode.

or

& & -

Resets the TI-30X Ö. Returns unit to

default settings; clears memory

variables, pending operations, all entries

in history, and statistical data; clears

constant mode and Ans.

Fractions

N %j %O

Fractional calculations can display fractional or decimal

results. Results are automatically simplified.

¦ N enters a fraction. Press N between whole number,

numerator, and denominator. The unit, numerator, and

denominator must be positive integers.

¦ % j converts between fractions and decimals.

¦ % O converts between mixed numbers and

simple fractions.

Pi

g

Angle Modes

I =

I displays a menu to specify the Angle mode as

degrees, radians, or gradients.

= displays a menu to specify the Angle unit modifier—

To set the Angle mode for any part of an entry:

¦ Select the Angle mode. Entries are interpreted and results

displayed according to the Angle mode, or

¦ Select a unit modifier (Ä Å Æ) for any part of an entry.

Entries with unit modifiers are interpreted accordingly,

overriding the Angle mode.

To convert an entry:

¦ Set the Angle mode to the unit you want to convert to.

Then use a unit modifier to designate the unit to convert

from. (Angles of trigonometric functions convert values

inside parentheses first.), or

¦ Select 4DMS, which converts an entry to DMS (Ä Å Æ)

Notation.

Trigonometry

> ? @

%Z[\

just as you would write them. Set the desired Angle mode

before starting trigonometric calculations.

Hyperbolics

%Y

hyperbolic function of the next trigonometry key that you

press. Angle modes do not affect hyperbolic calculations.

Logarithms

A B %]^

A yields the common logarithm of a number.

B yields the logarithm of a number to the base e

(e=2.819291929).

%] raises 10 to the power you specify.

%^ raises e to the power you specify.

RectangularÍPolar

%k

% k displays a menu to convert rectangular

coordinates (x,y) to polar coordinates (r,

q) or vice versa.

Set Angle mode, as necessary, before starting calculations.

Constants

%l

% l turns Constant mode on and lets you define a

constant.

To store an operation to K and recall it:

1. Press %l.

2. Enter any combination of numbers, operators, and/or

values, up to 44 characters, beginning with an operator.

3. Press < to save the operation. K displays in the

indicator line.

4. Each subsequent time you press <, the TI-30X Ö

recalls the stored operation and applies it to the last

answer or the current entry.

Press % l again to turn Constant mode off.

Memory

z L %h{

You can store a real number or an expression that results

in a real number to a memory variable.

¦ z accesses the menu of variables.

¦ L lets you store values to variables.

¦ % h recalls the values of variables.

¦ % { clears all variable values.

Notation

%‚ %d %C

% ‚ displays the Decimal Notation mode menu.

These modes affect

restores standard notation (floating-decimal) format.

0123456789

sets decimal places to

n (0–9), retaining

numeric notation mode format.

% d displays the Numeric Notation mode menu.

These modes affect

only the display of results.

¦ FLO (default): Floating Notation, with digits to the left and

right of the decimal

¦ SCI: Scientific Notation

¦ ENG: Engineering Notation (exponent is a multiple of 3)

% C enters a value in Scientific Notation, regardless

of the numeric notation mode. Press M before entering a

negative exponent.