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Casio fx-991ES PLUS User Manual

Casio fx-991ES PLUS
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Important!
The function you input for numerical table generation is deleted whenever you
display the setup menu in the TABLE Mode and switch between Natural Display
and Linear Display.
Vector Calculations (VECTOR)
Use the VECTOR Mode to perform 2-dimensional and 3-dimensional
vector calculations. To perform a vector calculation, you first assign data to
special vector variables (VctA, VctB, VctC), and then use the variables in
the calculation as shown in the example below.
Example 1: To assign (1, 2) to VctA and (3, 4) to VctB, and then perform
the following calculations: (1, 2) + (3, 4)
1. Press
(VECTOR) to enter the VECTOR Mode.
2. Press (VctA) (2).
This will display the Vector Editor for input of the 2-dimensional vector
for VctA.
(1) "A" stands for "VctA".
3. Input the elements of VctA: 1 2 .
4. Perform the following key operation:
(VECTOR) (Data) (VctB) (2).
This will display the Vector Editor for input of the 2-dimensional vector
for VctB.
5. Input the elements of VctB: 3 4 .
6. Press to advance to the calculation screen, and perform the
calculation (VctA+VctB):
(VECTOR) (VctA) (VECTOR) (VctB) .
This will display the VctAns screen with the calculation results.
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Casio fx-991ES PLUS Specifications

General IconGeneral
TypeScientific
CoverNo
Form factorDesktop
Control typeButtons
Product colorGray
Digits15 digits
Display typeDot-matrix
Display resolution96 x 31 pixels
Display number of lines10 lines
Storage media typeNot available
Battery life3 year(s)
Battery typeLR44
Power sourceBattery/Solar
Number of batteries supported1
Symbolic notationSquare root
Conversion betweenDecimal, Fraction, Percent
Convert angles from degrees toGradian, Radian
Random number/integer generatorYes
Weight and Dimensions IconWeight and Dimensions
Depth162 mm
Width80 mm
Height11.1 mm
Weight95 g

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