Casio Fx991ms User Guide

E-19 Use the 
F key to enter the VCT Mode when you want
to perform vector calculations.
VCT.....................................................
F F F 3
Note that you must create one or more vector before you
can perform vector calculations.
•You can have up to three vectors, named A, B, and C, in
memory at one time.
•The results of vector calculations are stored automatically
into VctAns memory. You can use the matrix in VctAns
memory in subsequent vector calculations.
kCreating a Vector
To  c reate a...

E-20 •Example: To add Vector A = (1 – 2 3) to Vector B = (4 5
–6). (Result: 
(5 3 –3))
(3-dimensional Vector A)A
 z
 1(Dim)
 1(A)
 3 =
(Element input)1 =
 D 2 =
 3 = t
(3-dimensional Vector B)A
 z
 1(Dim)
 2(B)
 3 =
(Element input)4 =
 5 =
 D 6 = t
(VctA + VctB)A
 z
 3(Vct)
 1(A)
 +
A
 z
 3(Vct)
 2(B)
 =
• An error occurs in the above procedure if you specify
vectors of different dimensions.
kCalculating the Scalar Product of
a Vector
Use the procedure shown below to obtain the scalar
product (fixed...

E-21
kCalculating the Outer Product of
Two Vectors
Use the procedure described below to obtain the outer
product for two vectors.
•Example: To  c alculate the outer product of Vector A and
Vector B (Result: 
(– 3, 18, 13))
(VctA
VctB)A
 z
 3(Vct)
 1(A) -
A
 z
 3(Vct)
 2(B) =
• An error occurs in the above procedure if you specify
vectors of different dimensions.
kDetermining the Absolute Value of
a Vector
Use the procedure shown below to obtain the absolute
value (size) of a vector.
•Example: To...

E-22
COMP
(Ans(AbsVctA
AbsVctB))\
 R A
 A
 A
 z
 3(Vct)
 1(A)
-
 A
 A
 A
 z 3(Vct)
 2(B)
 T =
(cos–1Ans) (Result: 108.4349488°)A
 V
 g =
(VctA
VctB)A
 z
 3(Vct)
 1(A)
 -
A
 z
 3(Vct)
 2(B)
 =
(AbsVctAns)A
 A
 A
 z
 3(Vct)
 4(Ans)
 =
(VctAnsAns)
(Result: (–0.666666666  0.333333333   – 0.666666666 ))A
 z
 3(Vct)
 4(Ans)
 \
 g =
Metric Conversions
Use the F key to enter the COMP Mode when you
want to perform metric conversions.
COMP............................................................
F 1
• A total...

E-23
COMP
u Conversion Pair Table
Based on NIST Special Publication 811 (1995).
Scientific Constants
Use the F key to enter the COMP Mode when you
want to perform calculations using scientific constants.
COMP............................................................
F 1
•A total of 40 commonly-used scientific constants, such
as the speed of light in a vacuum and Planck’s constant
are built-in for quick and easy lookup whenever you need
them.
in → cm 01
cm → in 02
ft → m03
m → ft 04
yd → m05
m → yd 06...

E-24 •Simply input the number that corresponds to the scientific
constant you want to look up and it appears instantly on
the display.
•See the Scientific Constant Table for a complete list of
available constants.
•Example: To determine how much total energy a person
weighing 65kg has (E = mc
2 = 5.841908662 × 1018)
65 
L 28 K =65 Co 2 5.84190866218
28 is the “speed of light in vacuum” constant number.
u Scientific Constant Table
Based on ISO Standard (1992) data and CODATA recom-
mended values (1998)....

E-25
To select this constant:Input this scientificconstant number:molar volume of ideal gas (Vm) 26molar gas constant (R) 27speed of light in vacuum (C 0)28first radiation constant (C 1)29second radiation constant (C 2)30Stefan-Boltzmann constant (σ)31electric constant (ε 0)32magnetic constant (µ  0)33magnetic flux quantum (φ   0)34standard acceleration of gravity (g) 35conductance quantum (G 0)36characteristic impedance of vacuum (Z 0)37Celsius temperature (t)38Newtonian constant of gravitation (G) 39...

E-26
u To replace the battery
1Remove the five screws that
hold the back cover in place
and then remove the back
cover.
2Remove the old battery.
3Wipe off the sides of new
battery with a dry, soft cloth.
Load it into the unit with the
positive 
k side facing up (so
you can see it).
4Replace the back cover and secure it in place with the
five screws.
5Press 
5 to turn power on. Be sure not to skip this
step.
fx-570MSThis calculator is powered by single G13 Type (LR44)
button battery.
•Replacing the...

E-27
5Replace the battery cover and secure it in place with
the screw.
6Press 
5 to turn power on.
Auto Power Off
Calculator power automatically turns off if you do not
perform any operation for about six minutes. When this
happens, press 
5 to turn power back on.
Specifications
Power Supply:
fx-570MS:Single G13 Type button battery (LR44)
fx-991MS:Solar cell and a single G13 Type button
battery (LR44)
Battery Life:
fx-570MS:Approximately 9,000 hours continuous
display of flashing cursor.
Approximately 3...

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