Casio Fx991ms User Guide

fx-570MS
fx-991MS
CA 310030-001V08
User’s Guide 2
(Additional Functions)
http://world.casio.com/edu_e/E 

CASIO ELECTRONICS CO., LTD.
Unit 6, 1000 North Circular Road,
London NW2 7JD, U.K.
Please keep your manual and all information handy for 
future reference.
Important! 

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Contents
Before getting started... .......................... 3
kModes .................................................................... 3
Mathematical Expression Calculations
and Editing Functions ............................ 4
kReplay Copy .......................................................... 4
kCALC Memory ....................................................... 5
kSOLVE Function .................................................... 5
Scientific Function Calculations ............ 6...

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Vector Calculations ............................... 18
kCreating a Vector ................................................. 19
kEditing Vector Elements ....................................... 19
kAdding and Subtracting Vectors .......................... 19
kCalculating the Scalar Product of a Vector .......... 20
kCalculating the Inner Product of Two Vectors ...... 20
kCalculating the Outer Product of Two Vectors ..... 21
kDetermining the Absolute Value of a Vector ........ 21
Metric Conversions...

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Before getting started...
kModes
Before starting a calculation, you must first enter the correct
mode as indicated in the table below.
• The following table shows the modes and required
operations for the fx-570MS and fx-991MS.
fx-570MS and fx-991MS Modes
• Pressing the F key more than three times displays
additional setup screens. Setup screens are described
where they are actually used to change the calculator
setup.
• In this manual, the name of the mode you need to enter
in order to perform the...

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•Mode indicators appear in the upper part of the display,
except for the BASE indicators, which appear in the
exponent part of the display.
•Engineering symbols are automatically turned off while
the calculator is the BASE Mode.
•You cannot make changes to the angle unit or other
display format (Disp) settings while the calculator is in
the BASE Mode.
•The COMP, CMPLX, SD, and REG modes can be used
in combination with the angle unit settings.
•Be sure to check the current calculation mode (SD, REG,...

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COMPCMPLX
about using multi-statements, see “Multi-statements” in
the separate “User’s Guide.”
•Only the expressions in replay memory starting from the
currently displayed expression and continuing to the last
expression are copied. Anything before the displayed
expression is not copied.
kCALC Memory
•CALC memory lets you temporarily store a mathematical
expression that you need to perform a number of times
using different values. Once you store an expression,
you can recall it, input values for its...

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COMP
1
2 B 
 AC –       DC2
p 2 p u p 1 - p k ,
R 1 \ 2 T - p h - p k K
A I(B?)14 =(A?)](C?)2 =(D?)9 l 8 =
[ [(A?)A I
•Since the SOLVE function uses Newton’s Method, cer-
tain initial values (assumed values) can make it impos-
sible to obtain solutions. In this case, try inputting an-
other value that you assume to be near the solution and
perform the calculation again.
•The SOLVE function may be unable to obtain a solution,
even though a solution exists.
•Due to certain idiosyncrasies of Newton’s...

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To input this symbol:Perform this key operation:Unit
k (kilo)
A k103
M (Mega)A M106
G (Giga)A g109
T (Tera)A t1012
m (milli)A m10–3
µ (micro)A N10–6
n (nano)A n10–9
p (pico)A p10–12
f (femto)A f10–15
1Disp 
•Press 1. On the engineering symbol setting screen that
appears, press the number key ( 1 or 2) that corre-
sponds to the setting you want to use.
1(Eng ON): Engineering symbols on (indicated by
“Eng” on the display)
2(Eng OFF):Engineering symbols off (no “Eng”
indicator)
•The following are the...

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CMPLX
A P 0.9
J 900.9 
1              m
Complex Number
Calculations
Use the F key to enter the CMPLX Mode when you
want to perform calculations that include complex
numbers.
CMPLX ...........................................................  
F 2
•The current angle unit setting (Deg, Rad, Gra) affects
CMPLX Mode calculations. You can store an expres-
sion in CALC memory while in the CMPLX Mode.
•Note that you can use variables A, B, C, and M only in
the CMPLX Mode. Variables D, E, F, X, and Y are...