Texas Instruments Calculator User Manual
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BA II PLUS™ PROFESSIONAL Calculator

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USA FCC Information Concerning Radio Frequency

Interference

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.

If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, you can try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

Consult the dealer or an experienced radio/television technician for help.

Caution: Any changes or modifications to this equipment not expressly approved by Texas Instruments may void your authority to operate the equipment.

© 2004 Texas Instruments Incorporated

ii

Table of Contents

 

1 Overview of Calculator Operations..................................

1

Turning On the Calculator .............................................................

1

Turning Off the Calculator.............................................................

1

Selecting 2nd Functions .................................................................

2

Reading the Display .......................................................................

2

Setting Calculator Formats ...........................................................

4

Resetting the Calculator ................................................................

6

Clearing Calculator Entries and Memories ...................................

6

Correcting Entry Errors...................................................................

7

Math Operations ............................................................................

8

Memory Operations .....................................................................

12

Calculations Using Constants.......................................................

13

Last Answer Feature.....................................................................

14

Using Worksheets: Tools for Financial Solutions ........................

15

.......................................................................................................

19

2 Time-Value-of-Money and Amortization Worksheets...

21

TVM and Amortization Worksheet Variables .............................

22

Entering Cash Inflows and Outflows...........................................

25

Generating an Amortization Schedule .......................................

25

Example: Computing Basic Loan Interest....................................

26

Examples: Computing Basic Loan Payments ...............................

27

Examples: Computing Value in Savings ......................................

28

Example: Computing Present Value in Annuities.......................

29

Example: Computing Perpetual Annuities..................................

30

Example: Computing Present Value of Variable Cash Flows .....

31

Example: Computing Present Value of a Lease With Residual

 

Value........................................................................................

33

Example: Computing Other Monthly Payments.........................

34

Example: Saving With Monthly Deposits ....................................

35

Example: Computing Amount to Borrow and Down Payment . 36

Example: Computing Regular Deposits for a Specified Future

 

Amount ...................................................................................

37

Example: Computing Payments and Generating an

 

Amortization Schedule...........................................................

38

Example: Computing Payment, Interest, and Loan Balance

 

After a Specified Payment .....................................................

39

3 Cash Flow Worksheet......................................................

41

Cash Flow Worksheet Variables...................................................

41

Uneven and Grouped Cash Flows................................................

43

Entering Cash Flows .....................................................................

43

Table of Contents

iii

 

Deleting Cash Flows......................................................................

44

 

Inserting Cash Flows .....................................................................

44

 

Computing Cash Flows .................................................................

45

 

Example: Solving for Unequal Cash Flows .................................

47

 

Example: Value of a Lease with Uneven Payments ....................

49

4

Bond Worksheet .............................................................

53

 

Bond Worksheet Variables ...........................................................

54

 

Bond Worksheet Terminology .....................................................

56

 

Entering Bond Data and Computing Results ..............................

56

 

Example: Computing Bond Price, Accrued Interest, and

 

 

Modified Duration ..................................................................

58

5

Depreciation Worksheet ................................................

59

 

Depreciation Worksheet Variables ..............................................

59

 

Entering Data and Computing Results ........................................

61

 

Example: Computing Straight-Line Depreciation .......................

62

6

Statistics Worksheet .......................................................

65

 

Statistics Worksheet Variables .....................................................

65

 

Regression Models ........................................................................

67

 

Entering Statistical Data...............................................................

68

 

Computing Statistical Results.......................................................

69

7

Other Worksheets ...........................................................

71

 

Percent Change/Compound Interest Worksheet ........................

71

 

Interest Conversion Worksheet....................................................

74

 

Date Worksheet ............................................................................

76

 

Profit Margin Worksheet .............................................................

78

 

Breakeven Worksheet ..................................................................

80

 

Memory Worksheet ......................................................................

82

 

.......................................................................................................

83

A Appendix — Reference Information..............................

85

 

Formulas ........................................................................................

85

 

Error Messages ..............................................................................

96

 

Accuracy Information ...................................................................

98

 

AOS™ (Algebraic Operating System) Calculations .....................

98

 

Battery Information......................................................................

99

 

In Case of Difficulty ....................................................................

100

 

Texas Instruments Support and Service .....................................

101

 

Texas Instruments (TI) Warranty Information ...........................

102

 

Index..............................................................................

105

iv

Table of Contents

1

Overview of Calculator Operations

This chapter describes the basic operation of your BA II PLUS™ PROFESSIONAL calculator, including how to:

Turn on and turn off the calculator

Select second functions

Read the display and set calculator formats

Clear the calculator and correct entry errors

Perform math and memory operations

Use the Last Answer feature

Use worksheets

Turning On the Calculator

Press $.

If you turned off the calculator by pressing $, the calculator returns to the standard-calculatormode with a displayed value of zero.

All worksheets and formats for numbers, angle units, dates, separators, and calculation method retain previous values and configurations.

If the Automatic Power Down™ (APD™) feature turned off the calculator, the calculator turns on exactly as you left it, saving display settings, stored memory, pending operations, and error conditions.

Turning Off the Calculator

Press $.

The displayed value and any error condition clear.

Any unfinished standard-calculatoroperation and worksheet calculation in progress cancel.

Overview of Calculator Operations

1

The Constant Memory™ feature retains all worksheet values and settings, including the contents of the 10 memories and all format settings.

Automatic Power Down(APD) Feature

To prolong battery life, the Automatic Power Down (APD) feature turns off the calculator automatically after about five minutes of inactivity.

The next time you press $, the calculator turns on exactly as you left it, saving display settings and stored memory and any pending operations or error conditions.

Selecting 2nd Functions

The primary function of a key is printed on the key itself. For example, the primary function of the $key is to turn on or turn off the calculator.

Most keys include a second function printed above the key. To select a second function, press & and the corresponding key. (When you press &, the 2nd indicator appears in the upper left corner of the display.)

For example, pressing &Uexits the selected worksheet and returns the calculator to the standardcalculator mode.

Note: To cancel after pressing &, press & again.

Reading the Display

The display shows the selected variable labels with values up to 10 digits. (The calculator displays values exceeding 10 digits in scientific notation.)

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Overview of Calculator Operations

The indicators along the top of the display tell you which keys are active and offer information about the status of the calculator.

Indicator

Meaning

 

 

2nd

Press a key to select its second function.

 

 

INV

Press a key to select its inverse trigonometric function.

 

 

HYP

Press a key to select its hyperbolic function.

 

 

COMPUTE

Press %to compute a value for the displayed variable.

 

 

ENTER

Press !to assign the displayed value to the displayed

 

variable.

 

 

SET

Press &V to change the setting of the displayed

 

variable.

 

 

# $

Press " or # to display the previous or next variable in the

 

worksheet.

 

Note: To easily scroll up or down through a range of

 

variables, press and hold # or ".

 

 

DEL

Press &W to delete a cash flow or statistical data point.

 

 

INS

Press &X to insert a cash flow or statistical data point.

 

 

BGN

TVM calculations use beginning-of-periodpayments. When

 

BGN is not displayed, TVM calculations useend-of-period

 

payments (END).

 

 

RAD

Angle values appear in radians. When RAD is not displayed,

 

angle values appear and must be entered in degrees.

The displayed value is entered in the selected worksheet. The indicator clears following a computation.

The displayed value is computed in the selected worksheet. When a value changes and invalidates a computed value, the_indicator clears.

=

The displayed variable is assigned the displayed value.

 

 

The displayed value is negative.

 

 

Overview of Calculator Operations

3

Setting Calculator Formats

You can change these calculator formats:

To Select

Press

Display

Default

 

 

 

Number of

&| DEC 0–9(Press 9 for

2

decimal

 

floating-decimal)

 

places

 

 

 

 

 

 

 

Angle units

#

DEG (degrees)

DEG

 

 

RAD (radians)

 

 

 

 

 

Dates

#

US (mm-dd-yyyy)

US

 

 

Eur (dd-mm-yyyy)

 

 

 

 

 

Number

#

US (1,000.00 )

US

separators

 

Eur (1.000,00)

 

 

 

 

 

 

 

 

Calculation

#

Chn (chain)

Chn

method

 

AOSé (algebraic

 

 

 

 

operating system)

1.To access format options, press &|. The DEC indicator appears with the selected number of decimal places.

2.To change the number of decimal places displayed, key in a value and press !.

3.To access another calculator format, press # or " once for each format.

For example, to access the angle unit format, press #. To access the number-separatorformat, press """or ###.

4.To change the selected format, press &V.

5.To change another calculator format, repeat step 3 and step 4.

— or —

To return to the standard-calculatormode, press &U.

— or —

To access a worksheet, press a worksheet key or key sequence.

Choosing the Number of Decimal Places Displayed

The calculator stores numeric values internally to an accuracy of 13 digits, but you can specify the number of decimal places you want to display. The calculator displays up to 10 digits with the floating-decimaloption. Results exceeding 10 digits appear in scientific notation.

4

Overview of Calculator Operations

Changing the number of decimal places affects the display only. Except for amortization and depreciation results, the calculator does not round internal values. To round the internal value, use the round function. (See “Rounding &o” on page 10.)

Note: All examples in this guidebook assume a setting of two decimal places. Other settings might show different results.

Choosing the Angle Units

The angle unit value affects the display of results in trigonometric calculations. When you select radians, the RAD indicator appears in the upper right corner of the display. No indicator appears when you select the default setting of degrees.

Using Dates

The calculator uses dates with the Bond and Date worksheets and the French depreciation methods. To enter dates, use this convention: mm.ddyy (US) ordd.mmyy (European). After you key in the date, press

!.

Choosing Calculation Methods

When you choose the chain (Chn) calculation method, the calculator solves problems in the order that you enter them. (Most financial calculators useChn.)

For example, when you enter 3 H2 <4 N, the Chn answer is 20 (3 + 2 = 5, 5 * 4 = 20).

Using AOSé (algebraic operating system), the calculator solves problems according to the standard rules of algebraic hierarchy, computing multiplication and division operations before addition and subtraction operations. (Most scientific calculators useAOS.)

For example, when you enter 3 H2 <4 N, the AOS answer is 11 (2 Q 4 = 8; 3 + 8 = 11).

Resetting Default Values

To reset default values for all of the calculator formats, press & zwith one of the formats displayed.

Overview of Calculator Operations

5

Resetting the Calculator

Resetting the calculator:

Clears the display, all 10 memories, any unfinished calculations, and all worksheet data.

Restores all default settings

Returns operation to the standard-calculatormode

Because the calculator includes alternative methods that let you clear data selectively, use reset carefully to avoid losing data needlessly. (See “Clearing Calculator Entries and Memories” on page 6.)For example, you might reset the calculator before using it for the first time, when starting a new calculation, or when having difficulty operating the calculator and other possible solutions do not work. (See “In Case of Difficulty” on page 100.)

Pressing & }!

1.Press & }. The RST ? andENTER indicators appear.

Note: To cancel reset, press & U.0.00 appears.

2.Press !. RST and0.00 appear, confirming that the calculator is reset.

Note: If an error condition exists, press P to clear the display before attempting to reset.

Performing a Hard Reset

You can also reset the calculator by gently inserting a pointed object (such as an unfolded paper clip or similar object) in the hole marked RESET in back of the calculator.

Clearing Calculator Entries and Memories

Note: To clear variables selectively, see the specific worksheet chapters in this guidebook.

To clear

Press

 

 

One character at a time, starting with the last digit

*

keyed in

 

 

 

An incorrect entry, error condition, or error

P

message

 

 

 

6

Overview of Calculator Operations