fx-100MS/fx-570MS/
fx-991MS/
(2nd edition / S-V.P.A.M.)
Before Using the Calculator
Calculation Modes and Calculator Setup
Basic Calculations
- ▶Inputting Expression and Values
- ▶Arithmetic Calculations
- ▶Fraction Calculations
- ▶Percent Calculations
- ▶Degree, Minute, Second (Sexagesimal) Calculations
- ▶Multi-Statements
- ▶Using Engineering Notation
- ▶Using Engineering Symbols
- ▶Calculation History and Replay
- ▶Using Memory Functions
Function Calculations
- ▶Pi (π), Natural Logarithm Base e
- ▶Trigonometric Functions, Inverse Trigonometric Functions
- ▶Hyperbolic Functions, Inverse Hyperbolic Functions
- ▶Angle Unit Conversion
- ▶Exponential Functions, Logarithmic Functions
- ▶Power Functions and Power Root Functions
- ▶Integration Calculations
- ▶Differential Calculations
- ▶Rectangular-Polar Coordinate Conversion
- ▶Factorial (!)
- ▶Random Number (Ran#)
- ▶Permutation (nPr) and Combination (nCr)
- ▶Rounding function (Rnd)
- ▶Using CALC
- ▶Using SOLVE
- ▶Scientific Constants (fx-570MS/fx-991MS only)
- ▶Metric Conversion (fx-570MS/fx-991MS only)
Using Calculation Modes
- ▶Complex Number Calculations (CMPLX)
- ▶Statistical Calculations (SD, REG)
- ▶Base-n Calculations (BASE)
- ▶Equation Calculations (EQN)
- ▶Matrix Calculations (MAT) (fx-570MS/fx-991MS only)
- ▶Vector Calculations (VCT) (fx-570MS/fx-991MS only)
Technical Information
Matrix Calculations (MAT) (fx-570MS/fx-991MS only)
Use the 
key to enter the MAT Mode when you want to perform matrix calculations.
(MAT)
Use the MAT Mode to perform calculations involving matrices of up to 3 rows by 3 columns. To perform a matrix calculation, you first assign data to special matrix variables (MatA, MatB, MatC), and then use the variables in the calculation as shown in the example below.
Note
Matrix calculations can use up to two levels of the matrix stack. Squaring a matrix, cubing a matrix, or inverting a matrix uses one stack level. See "Stacks" for more information.
Example 1: To assign 
to MatA and 
to MatB, and then perform the following calculations: × (MatA × MatB), + (MatA + MatB)
1. Press 
(MAT)
(Dim)(A).
2. Input the dimensions of MatA: 2
2.
This will display the Matrix Editor for input of the elements of the 2 × 2 matrix you specified for MatA.
(1) Shows the row number and column number of the element. (Example: MatA23 indicates row 2, column 3 of MatA.)
3. Input the elements of MatA: 2111.
4. Perform the following key operation: (MAT)(Dim)(B) 22.
This will display the Matrix Editor for input of the elements of the 2 × 2 matrix you specified for MatB.
5. Input the elements of MatB: 2
112.
6. Press 
to advance to the calculation screen, and perform the first calculation (MatA × MatB):(MAT)
(Mat)(A)
(MAT)(Mat)(B).
This will display the MatAns screen with the calculation results.
Note: "MatAns" stands for "Matrix Answer Memory".
7. Perform the next calculation (MatA + MatB): (MAT) (Mat)(A)
(MAT)(Mat)(B).
Matrix Answer Memory
Whenever the result of a calculation executed in the MAT Mode is a matrix, the MatAns screen will appear with the result. The result also will be assigned to a variable named "MatAns".
The MatAns variable can be used in calculations as described below.
To insert the MatAns variable into a calculation, perform the following key operation: (MAT)(Mat)(Ans).
Pressing any one of the following keys while the MatAns screen is displayed will switch automatically to the calculation screen: ,
,,
,
,
,(x3). The calculation screen will show the MatAns variable followed by the operator or function for the key you pressed.
Assigning and Editing Matrix Variable Data
Important: The following operations are not supported by the Matrix Editor: 
,(M-),
(STO). Pol, Rec, and multi-statements also cannot be input with the Matrix Editor.
To assign new data to a matrix variable:
1. Press (MAT)(Dim), and then, on the menu that appears, select the matrix variable to which you want to assign data.
2. On the next menu that appears, input the dimensions.
3. Use the Matrix Editor that appears to input the elements of the matrix.
Example 2: To assign 
to MatC
- (MAT)(Dim)(C) 23
101011 
To edit the elements of a matrix variable:
1. Press (MAT)(Edit), and then, on the menu that appears, select the matrix variable you want to edit.
2. Use the Matrix Editor that appears to edit the elements of the matrix.
Use the 
,
,
, and 
keys to display the element you want to edit. Input a new value and then press .
Matrix Calculation Examples
The following examples use MatA = and MatB = from Example 1, and MatC = from Example 2. You can input a matrix variable into a key operation by pressing (MAT)(Mat) and then pressing one of the following number keys: (A),(B),(C).
Example 3: 3 × MatA (Matrix scalar multiplication). (Result: 
)
- 3 MatA
Example 4: Obtain the determinant of MatA (Det(MatA)).
- (MAT)(Det) MatA
- 1.
Example 5: Obtain the transposition of MatC (Trn(MatC)). (Result: 
)
- (MAT)(Trn) MatC
Example 6: Obtain the inverse matrix of MatA (MatA-1). (Result: 
)
Note: You cannot use 
for this input. Use the key to input "-1".
- MatA
Example 7: Obtain the absolute value of each element of MatB (Abs(MatB)). (Result: 
)
(Abs) MatB 
Example 8: Determine the square and cube of MatA (MatA2, MatA3). (Result: MatA2 = 
, MatA3 = 
)
Note: You cannot use for this input. Use to specify squaring, and (x3) to specify cubing.
- MatA
- MatA (x3)
