Casio NP20 User manual

E
ALGEBRA FX 2.0
User’s Guide

GUIDELINES LAID DOWN BY FCC RULES FOR USE OF THE UNIT IN THE U.S.A. (not appli-
cable to other areas).
NOTICE
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 protec-
tion 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 guar-
antee 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, the user is encouraged to 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/TV technician for help.
FCC WARNING
Changes or modifications not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment.
Proper connectors must be used for connection to host computer and/or peripherals in order to
meet FCC emission limits.
Connector SB-62 Power Graphic Unit to Power Graphic Unit
Connector FA-123 Power Graphic Unit to PC for IBM/Macintosh Machine
IBM is a registered trademark of International Business Machines Corporation.
Macintosh is a registered trademark of Apple Computer, Inc.
CASIO ELECTRONICS CO., LTD.
Unit 6, 1000 North Circular Road,
London NW2 7JD, U.K.
Important!
Please keep your manual and all information handy for
future reference.

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BEFORE USING THE CALCULATOR
FOR THE FIRST TIME...
This calculator does not contain any main batteries when you purchase it. Be sure to
perform the following procedure to load batteries, reset the calculator, and adjust the
contrast before trying to use the calculator for the first time.
1. Making sure that you do not accidently press the okey, slide the case onto the
calculator and then turn the calculator over. Remove the back cover from the calculator
by pulling with your finger at the point marked 1.
2. Load the four batteries that come with calculator.
•Make sure that the positive (+) and negative (–) ends of the batteries are facing cor-
rectly.
3. Remove the insulating sheet at the location marked “BACK UP” by pulling in the direc-
tion indicated by the arrow.
4. Replace the back cover, making sure that its tabs enter the holes marked 2and turn
the calculator front side up. The calculator should automatically turn on power and
perform the memory reset operation.
P
1
BACK UP
BACK UP
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P button
5. Press m.
•If the Main Menu shown to the right is not on the display,
press the P button on the back of the calculator to
perform memory reset.
6. Use the cursor keys (f, c, d, e) to select the SYSTEM icon and press
w, then press 2( ) to display the contrast adjustment screen.
7. Adjust the contrast.
•The ecursor key makes display contrast darker.
•The dcursor key makes display contrast lighter.
•1(INIT) returns display contrast to its initial default.
8. To exit display contrast adjustment, press m.

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Turning Power On And Off
Using Modes
Basic Calculations
Replay Feature
Fraction Calculations
Exponents
Graph Functions
Dual Graph
Box Zoom
Dynamic Graph
Table Function
Quick-Start

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Quick-Start
Welcome to the world of graphing calculators.
Quick-Start is not a complete tutorial, but it takes you through many of the most common
functions, from turning the power on, and on to graphing complex equations. When
you’re done, you’ll have mastered the basic operation of this calculator and will be ready
to proceed with the rest of this user’s guide to learn the entire spectrum of functions
available.
Each step of the examples in Quick-Start is shown graphically to help you follow along
quickly and easily. When you need to enter the number 57, for example, we’ve indi-
cated it as follows:
Press fh
Whenever necessary, we’ve included samples of what your screen should look like.
If you find that your screen doesn’t match the sample, you can restart from the begin-
ning by pressing the “All Clear” button o.
TURNING POWER ON AND OFF
To t u r n power on, press o.
To tu r n power off, press !o
OFF
.
Calculator power turns off automatically if you do not perform any operation within the
Auto Power Off trigger time you specify. You can specify either six minutes or 60
minutes as the trigger time.
USING MODES
This calculator makes it easy to perform a wide range of calculations by simply
selecting the appropriate mode. Before getting into actual calculations and operation
examples, let’s take a look at how to navigate around the modes.
To select the RUN •MAT Mode
1. Press mto display the Main Menu.
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Quick-Start

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2. Use defc to highlight RUN •MAT
and then press w.
This is the initial screen of the RUN •MAT Mode,
where you can perform manual calculations,
matrix calculations, and run programs.
BASIC CALCULATIONS
With manual calculations, you input formulas from left to right, just as they are written
on paper. With formulas that include mixed arithmetic operators and parentheses, the
calculator automatically applies true algebraic logic to calculate the result.
Example: 15 ×3 + 61
1. Press oto clear the calculator.
2. Press bf*d+gbw.
Parentheses Calculations
Example: 15 ×(3 + 61)
1. Press bf*(d
+gb)w.
Built-In Functions
This calculator includes a number of built-in scientific functions, including trigonometric
and logarithmic functions.
Example: 25 ×sin 45˚
Important!
Be sure that you specify Deg (degrees) as the angle unit before you try this
example.
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1. Pressu3
SET UP
to display the SET UP screen.
2. Press cccc1(Deg) to specify
degrees as the angle unit.
3. Press ito clear the menu.
4. Press oto clear the unit.
5. Press cf*sefw.
REPLAY FEATURE
With the replay feature, simply press dor eto recall the last calculation that
was performed so you can make changes or re-execute it as it is.
Example: To change the calculation in the last example from (25 ×sin 45˚) to
(25 ×sin 55˚)
1. Press dto display the last calculation.
2. Press dtwice to move the cursor (t) to 4.
3. Press Dto delete 4.
4. Press f.
5. Press wto execute the calculation again.
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Quick-Start
REPLAY

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FRACTION CALCULATIONS
You can use the $key to input fractions into calculations. The symbol “ {” is used
to separate the various parts of a fraction.
Example: 1 15/16 + 37/9
1. Press o.
2. Press b$bf$
bg+dh$
jw.
Converting a Mixed Fraction to an Improper Fraction
While a mixed fraction is shown on the display, press !
d/c
$to convert it to an
improper fraction.
Press !
d/c
$again to convert back to a mixed fraction.
Converting a Fraction to Its Decimal Equivalent
While a fraction is shown on the display, press $to convert it to its decimal
equivalent.
Press $again to convert back to a fraction.
Indicates 6 7/144
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EXPONENTS
Example: 1250 ×2.065
1. Press o.
2. Press bcfa*c.ag.
3. Press Mand the ^indicator appears on the display.
4. Press f. The ^5 on the display indicates that 5 is an exponent.
5. Press w.
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Quick-Start