Casio fx-570ES PLUS User Manual
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Casio fx-570ES PLUS User Manual

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fx-570ES PLUS
fx-991ES PLUS
(2nd edition / NATURAL-V.P.A.M.)
User's Guide
CASIO Worldwide Education Website
https://edu.casio.com
Manuals are available in multi languages at
https://world.casio.com/manual/calc/
EN

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  • Page 1 PLUS fx-991ES PLUS (2nd edition / NATURAL-V.P.A.M.) User’s Guide CASIO Worldwide Education Website https://edu.casio.com Manuals are available in multi languages at https://world.casio.com/manual/calc/...

  • Page 2: Table Of Contents

    Table of Contents Before Using the Calculator............ 4 About this Manual..................4 Initializing the Calculator................4 Precautions....................4 Safety Precautions..................4 Handling Precautions..................5 Getting Started..................5 Removing the Hard Case................5 Turning Power On and Off................6 Adjusting Display Contrast................6 Key Markings....................
  • Page 3 Function Calculations............27 Pi (π), Natural Logarithm Base e............27 Trigonometric Functions................ 27 Hyperbolic Functions................27 Angle Unit Conversion................28 Exponential Functions................28 Logarithmic Functions................28 Power Functions and Power Root Functions.........29 Integration Calculations................. 30 Integration Calculation Precautions.............. 31 Tips for Successful Integration Calculations..........31 Differential Calculations.................
  • Page 4 Matrix Calculations (MATRIX)..............61 Matrix Answer Memory................. 63 Assigning and Editing Matrix Variable Data..........63 Matrix Calculation Examples.................64 Creating a Numerical Table from a Function (TABLE)......65 Vector Calculations (VECTOR)..............67 Vector Answer Memory................. 68 Assigning and Editing Vector Variable Data..........68 Vector Calculation Examples................ 69 Technical Information............

  • Page 5: Before Using The Calculator

    Before Using the Calculator About this Manual • In no event shall CASIO Computer Co., Ltd. be liable to anyone for special, collateral, incidental, or consequential damages in connection with or arising out of the purchase or use of this product and items that come with it.

  • Page 6: Handling Precautions

    Replace the battery immediately after display figures become dim. fx-570ES PLUS: Every 2 years fx-991ES PLUS: Every 3 years • A dead battery can leak, causing damage to and malfunction of the calculator.

  • Page 7: Turning Power On And Off

    Turning Power On and Off • Press to turn on the calculator. • Press (OFF) to turn off the calculator. Note • The calculator also will turn off automatically after approximately 10 minutes of non- use. Press the key to turn the calculator back on. Adjusting Display Contrast 1.

  • Page 8: Reading The Display

    Example: (sin )* 1 * Indicates the function that is accessed by the key operation ( ) before it. Note that this is not part of the actual key operation you perform. • The following shows an example of how a key operation to select an on- screen menu item is represented in this manual.
  • Page 9 Display indicators This indicator: Means this: The keypad has been shifted by pressing the key. The keypad will unshift and this indicator will disappear when you press a key. The alpha input mode has been entered by pressing the key. The alpha input mode will be exited and this indicator will disappear when you press a key.

  • Page 10: Using Menus

    Calculation history memory data is available and can be replayed, or there is more data above/ below the current screen. The display currently shows an intermediate result Disp of a multi-statement calculation. Important! • For some type of calculation that takes a long time to execute, the display may show only the above indicators (without any value) while it performs the calculation internally.

  • Page 11: Calculation Modes And Calculator Setup

    Calculation Modes and Calculator Setup Calculation Mode Before starting a calculation, you must first enter the correct mode as indicated in the table below. When you want to perform this type of Perform this key operation: operation: General calculations (COMP) Complex number calculations (CMPLX) Statistical and regression calculations...
  • Page 12 Underlined ( ___ ) settings are initial defaults. Specifying the Display Format To specify this Perform this key operation: display format: Natural Display (SETUP) (MthIO) (MathO) (MthIO-MathO) Natural Display (SETUP) (MthIO) (LineO) (MthIO-LineO) Linear Display (SETUP) (LineIO) (LineIO) Natural Display (MthIO-MathO, MthIO-LineO) causes fractions, irrational numbers, and other expressions to be displayed as they are written on paper.
  • Page 13 MthIO-LineO (Number Format: Norm 2) LineIO (Number Format: Norm 1) Note • The calculator switches to Linear Display automatically whenever you enter the STAT, BASE-N, MATRIX, or VECTOR Mode. Specifying the Default Angle Unit To specify this as the Perform this key operation: default angle unit: Degrees (SETUP)
  • Page 14 Fix: The value you specify (from 0 to 9) controls the number of decimal places for displayed calculation results. Calculation results are rounded off to the specified digit before being displayed. Example: (LineIO) 100 ÷ 7 = 14.286 (Fix 3) 14.29 (Fix 2) Sci: The value you specify (from 0 to 9) controls the number of significant digits for displayed calculation results.

  • Page 15: Initializing Calculator Settings

    Specifying the Stat Format Specifies whether or not to display a FREQ (frequency) column in the STAT Mode Statistics Editor. To specify this: Perform this key operation: Show FREQ Column (SETUP) (STAT) (ON) Hide FREQ Column (SETUP) (STAT) (OFF) Specifying the Decimal Point Display Format Specifies whether to display a dot or a comma for the calculation result decimal point.
  • Page 16 Angle Unit Number Format Norm 1 Fraction Display Format Complex Number a+bi Format Stat Format Decimal Point...

  • Page 17: Inputting Expressions And Values

    Inputting Expressions and Values Basic Input Rules Calculations can be input in the same form as they are written. When you press the priority sequence of the input calculation will be evaluated automatically and the result will appear on the display. Example 1: 4 ×...

  • Page 18: Inputting With Natural Display

    • When Natural Display is selected, pressing while the cursor is at the end of the input calculation will cause it to jump to the beginning, while pressing while the cursor is at the beginning will cause it to jump to the end. •...

  • Page 19: Using Values And Expressions As Arguments (Natural Display Only)

    ± a'√b ± d'√e ± a√b, ± d ± a√b, 1 ≦ a < 100, 1 < b < 1000, 1 ≦ c < 100 The ranges of the coefficients (a, b, c, d, e, f) are as shown below. 0 ≦...

  • Page 20: Overwrite Input Mode (Linear Display Only)

    Overwrite Input Mode (Linear Display only) You can select either insert or overwrite as the input mode, but only while Linear Display is selected. In the overwrite mode, text you input replaces the text at the current cursor location. You can toggle between the insert and overwrite modes by performing the operations: (INS).

  • Page 21: Basic Calculations

    Basic Calculations Use the key to enter the COMP Mode when you want to perform basic calculations. (COMP) Toggling Calculation Results While Natural Display is selected, each press of will toggle the currently displayed calculation result between its fraction form and decimal form, its √...

  • Page 22: Fraction Calculations

    Important! • Depending on the type of calculation result that is on the display when you press the key, the conversion process may take some time to perform. • With certain calculation results, pressing the key will not convert the displayed value.

  • Page 23: Percent Calculations

    • Fractions in calculation results are displayed after being reduced to their lowest terms. To switch a calculation result between improper fraction and mixed fraction form: (a b c d c ) Perform the following key operation: To switch a calculation result between fraction and decimal form: Press Percent Calculations Inputting a value and pressing...

  • Page 24: Multi-Statements

    Note • You must always input something for the degrees and minutes, even if they are zero. Example 1: 2°20’30” + 39’30” = 3°00’00” 3°0’0” Example 2: Convert 2°15’18” to its decimal equivalent. 2°15’18” (Converts sexagesimal to decimal.) 2.255 (Converts decimal to sexagesimal.) 2°15’18”...

  • Page 25: Calculation History And Replay

    (←) 0.000123×10 Calculation History and Replay Calculation History In the COMP, CMPLX, or BASE-N Mode, the calculator remembers up to approximately 200 bytes of data for the newest calculation. You can scroll through calculation history contents using Example: 1 + 1 = 2 2 + 2 = 4 3 + 3 = 6 (Scrolls back.)

  • Page 26: Using Memory Functions

    Using Memory Functions Answer Memory (Ans) The last calculation result obtained is stored in Ans (answer) memory. Ans memory contents are updated whenever a new calculation result is displayed. Answer Memory contents are updated whenever you execute a calculation using any one of the following keys: (M-), (STO).

  • Page 27: Independent Memory (M)

    To recall the contents of variable A (Continuing) To clear the contents of variable A (STO) Independent Memory (M) You can add calculation results to or subtract results from independent memory. The "M" indicator appears on the display when there is any value other than zero stored in independent memory.

  • Page 28: Function Calculations

    Function Calculations Use the key to enter the COMP Mode when you want to perform function calculations. (COMP) Note: Using functions can slow down a calculation, which may delay display of the result. Do not perform any subsequent operation while waiting for the calculation result to appear.

  • Page 29: Angle Unit Conversion

    (sinh) 1 1.175201194 Example 2: cosh 1 = 0 (cosh Angle Unit Conversion °, : These functions specify the angle unit. ° specifies degrees, radians, and grads. Input a function from the menu that appears when you perform the following key operation: (DRG ).

  • Page 30: Power Functions And Power Root Functions

    (,) 16 (MthIO-MathO, MthIO-LineO) Example 3: ) = 6 (MthIO-MathO, MthIO-LineO) Example 4: = 8 (MthIO-MathO, MthIO-LineO) Example 5: To calculate ln 90 (= log 90) to three significant digits (Sci 3) (SETUP) (Sci) 4.50×10 Power Functions and Power Root Functions Note that the input methods for , and...

  • Page 31: Integration Calculations

    (MthIO-MathO) 3√2 4.243 (LineIO) 4.243 Example 6: √5 + √-27 = -1.290024053 (LineIO) -1.290024053 Example 7: = 12 (LineIO) Note • The following functions cannot be input in consecutive sequence: x . If you input 2 , for example, the final will be ignored.

  • Page 32: Integration Calculation Precautions

    Example 2: ∫( , 1, 5, 1 × 10 ) = 0.8 (LineIO) (,) 1 (,) 5 π Example 3: ∫ (sin x + cos x) dx = π (tol: Not specified) (MthIO-MathO) (Angle unit: Rad) π (π) Integration Calculation Precautions •...

  • Page 33: Differential Calculations

    (1) Positive Part (2) Negative Part When integration values fluctuate widely due to minute shifts in the integration interval Divide the integration interval into multiple parts (in a way that breaks areas of wide fluctuation into small parts), perform integration on each part, and then combine the results.

  • Page 34: Differential Calculation Precautions

    Differential Calculation Precautions • Differential calculation can be performed in the COMP Mode only. • The following cannot be used in f(x), a, b, or tol: Pol, Rec, ∫, d/dx, Σ. • When using a trigonometric function in f(x), specify Rad as the angle unit.

  • Page 35: Rectangular-Polar Coordinate Conversion

    Rectangular-Polar Coordinate Conversion Pol converts rectangular coordinates to polar coordinates, while Rec converts polar coordinates to rectangular coordinates. (1) Rectangular Coordinates (Rec) (2) Polar Coordinates (Pol) Specify the angle unit before performing calculations. The calculation result for r and θ and for x and y are each assigned Calculation result θ...

  • Page 36: Factorial Function (!)

    Factorial Function (!) Example: (5 + 3)! = 40320 (x!) 40320 Absolute Value Function (Abs) Note that the input method is different depending upon whether you are using Natural Display or Linear Display. Example: |2 - 7| × 2 = 10 (MthIO-MathO) (Abs) 2 (LineIO)

  • Page 37: Permutation (Npr) And Combination (Ncr)

    (RanInt) 1 (,) 6 (Results shown here are for illustrative purposes only. Actual results will differ.) Permutation (nPr) and Combination (nCr) Example: To determine the number of permutations and combinations possible when selecting four people from a group of 10. Permutations: 10 (nPr) 4 5040...

  • Page 38: Using Calc

    Using CALC CALC lets you save calculation expressions that contain variables, which you can then recall and execute in the COMP Mode and the CMPLX Mode. The following describes the types of expressions you can save with CALC. • Expressions: 2X + 3Y, 2AX + 3BX + C, A + Bi •...

  • Page 39: Using Solve

    (CMPLX) (CMPLX) ( r∠θ) 2∠30 2∠60 To exit CALC: Note • During the time from when you press until you exit CALC by pressing , you should use Linear Display input procedures for input. Using SOLVE SOLVE uses Newton's method to approximate the solution of equations. Note that SOLVE can be used in the COMP Mode only.

  • Page 40: Solution Screen Contents

    (SOLVE) (1) Prompts for input of a value for Y (2) Current value of Y (3) Current value of X Input an initial value for X (Here, input 1): Solution Screen To exit SOLVE: Note • During the time from when you press (SOLVE) until you exit SOLVE by pressing , you should use Linear Display input procedures for input.

  • Page 41: Continue Screen

    (1) Equation (The equation you input.) (2) Variable solved for (3) Solution (4) (Left Side) - (Right Side) result "(Left Side) - (Right Side) result" shows the result when the right side of the equation is subtracted from the left side, after assigning the obtained value to the variable being solved for.

  • Page 42: Scientific Constants

    Scientific Constants Your calculator comes with 40 built-in scientific constants that can be used in any mode besides BASE-N. Each scientific constant is displayed as a unique symbol (such as π), which can be used inside of calculations. To input a scientific constant into a calculation, press (CONST) and then input the two-digit number that corresponds to the constant you want.
  • Page 43 07: (μN) nuclear magneton 08: (μB) Bohr magneton 09: ( ) Planck 10: (α) fine-structure constant constant, rationalized 11: (re) classical electron radius 12: (λ ) Compton wavelength 14: (λ ) proton Compton 13: (γ ) proton gyromagnetic ratio wavelength 15: (λ...

  • Page 44: Metric Conversion

    Metric Conversion The calculator's built-in metric conversion commands make it simple to convert values from one unit to another. You can use the metric conversion commands in any calculation mode except for BASE-N and TABLE. To input a metric conversion command into a calculation, press (CONV) and then input the two-digit number that corresponds to the command you want.
  • Page 45 17: pc km 18: km pc 19: km/h m/s 20: m/s km/h 21: oz g 22: g oz 23: lb kg 24: kg lb 25: atm Pa 26: Pa atm 27: mmHg Pa 28: Pa mmHg 29: hp kW 30: kW hp 31: kgf/cm 32: Pa kgf/cm 33: kgf •...

  • Page 46: Using Calculation Modes

    Using Calculation Modes Complex Number Calculations (CMPLX) To perform complex number calculations, first press (CMPLX) to enter the CMPLX Mode. You can use either rectangular coordinates (a+bi) or polar coordinates (r∠θ) to input complex numbers. Complex number calculation results are displayed in accordance with the complex number format setting on the setup menu.

  • Page 47: Cmplx Mode Calculation Examples

    CMPLX Mode Calculation Examples Example 1: (1 - i) i (MthIO-MathO) (Complex number format: a +bi) Example 2: (1 + i) + (1 - i) = 0 (MthIO-MathO) Example 3: To obtain the conjugate complex number of 2 + 3i (Complex number format: a+bi) (CMPLX) (Conjg) 2...

  • Page 48: Inputting Data

    To select this type of statistical calculation: Press this key: (Regression formula shown in parentheses) Single-variable (X) (1-VAR) Paired-variable (X, Y), linear regression (A+BX) (y = A + Bx) Paired-variable (X, Y), quadratic regression (_+CX (y = A + Bx + Cx Paired-variable (X, Y), logarithmic regression (ln X) (y = A + Blnx)
  • Page 49 The Statistics Editor provides 80 rows for data input when there is an X column only, 40 rows when there are X and FREQ columns or X and Y columns, or 26 rows when there are X, Y, and FREQ columns. Note •...

  • Page 50: Statistics Calculation Screen

    To delete all Statistics Editor contents: In the Statistics Editor, perform the following key operation: (STAT) (Edit) (Del-A). Statistics Calculation Screen The Statistics Calculation Screen is for performing statistical calculations with the data you input with the Statistics Editor. Pressing the while the Statistics Editor is displayed switches to the Statistics Calculation Screen.
  • Page 51 Display the Var sub-menu of commands for (Var) calculating the mean, standard deviation, etc. Display the Distr sub-menu of commands for Single-variable: normal distribution calculations (Distr) • For more information, see "Performing Normal Distribution Calculations". Display the Reg sub-menu of commands for regression calculations Paired-variable: •...
  • Page 52 Distr Sub-menu ( (STAT) (Distr)) (P() This menu can be used to calculate the (Q() probability of standard normal distribution. • For details see "Performing Normal (R() Distribution Calculations". ( t) MinMax Sub-menu ( (STAT) (MinMax)) Select this menu When you want to obtain this: item: (minX) Minimum value...
  • Page 53 Var Sub-menu ( (STAT) (Var)) Select this menu When you want to obtain this: item: Number of samples Mean of the X-data (σ Population standard deviation of the X-data Sample standard deviation of the X-data Mean of the Y-data (σ Population standard deviation of the Y-data Sample standard deviation of the Y-data Reg Sub-menu (...
  • Page 54 Commands when Quadratic Regression Calculation (_+CX ) Is Selected Reg Sub-menu ( (STAT) (Reg)) Select this menu When you want to obtain this: item: Regression coefficient constant term A Linear coefficient B of the regression coefficients Quadratic coefficient C of the regression coefficients (x ˆ...

  • Page 55: Calculating Estimated Values

    (110, 7310), (200, 8800), (290, 9310). Specify Fix 3 (three decimal places) for results. (SETUP) (STAT) (OFF) (SETUP) (Fix) (STAT) (A+BX) 3150 7310 8800 9310 (STAT) (Reg) 0.923 (STAT) (Type) (ln X) 0.998 (STAT) (Reg) (STAT) (Reg) -3857.984 (STAT) (Reg) 2357.532 Results: Linear Regression Correlation Coefficient: 0.923...

  • Page 56: Base-N Calculations (Base-N)

    menu that appears when you perform the following key operation: (STAT) (Distr). P, Q, R: These functions take the argument t and determine a probability of standard normal distribution as illustrated below. t: This function is preceded by the argument X, and determines the X - x normalized variate X t = σx...
  • Page 57 The initial default number mode when you enter the BASE-N Mode is decimal, which means input and calculation results use the decimal number format. Press one of the following keys to switch number modes: (DEC) for decimal, (HEX) for hexadecimal, (BIN) for binary, or (OCT) for octal.

  • Page 58: Specifying The Number Mode Of A Particular Input Value

    -2147483648 ≦ x ≦ 2147483647 Decimal 00000000 ≦ x ≦ 7FFFFFFF 80000000 ≦ x ≦ FFFFFFFF Positive: Hexadecimal Negative: Specifying the Number Mode of a Particular Input Value You can input a special command immediately following a value to specify the number mode of that value.
  • Page 59 Press this key: When you want to input this: Logical operator "and" (logical product), (and) which returns the result of a bitwise AND Logical operator "or" (logical sum), which (or) returns the result of a bitwise OR Logical operator "xor" (exclusive logical (xor) sum), which returns the result of a bitwise Logical operator "xnor"...

  • Page 60: Equation Calculations (Eqn)

    (BASE) (Not) 1010 1111111111110101 Example 6: To negate (take the two's complement) of 101101 (Neg(101101 (BASE) (Neg) 101101 1111111111010011 Note • In the case of a negative binary, octal or hexadecimal value, the calculator converts the value to binary, takes the two's complement, and then converts back to the original number base.

  • Page 61: Changing The Current Equation Type Setting

    • To solve 2x + x - 3 = 0, for example, press in step 2, and then input the following for the coefficients (a = 2, b = 1, c = -3): 2 • To change a coefficient value you already have input, move the cursor to the appropriate cell, input the new value, and then press •...

  • Page 62: Matrix Calculations (Matrix)

    (EQN) X + b Y + c Z = d (X=) (Y=) (Z=) Example 3: + x + = 0 (MthIO-MathO) (EQN) + bX + c = 0) √2 =) - √2 Example 4: - 2√2x + 2 = 0 (MthIO-MathO) (EQN) + bX + c = 0) (X=)
  • Page 63 1. Press (MATRIX) to enter the MATRIX Mode. 2. Press (MatA) (2×2). • This will display the Matrix Editor for input of the elements of the 2 × 2 matrix you specified for MatA. (1) "A" stands for "MatA". 3. Input the elements of MatA: 2 4.

  • Page 64: Matrix Answer Memory

    Matrix Answer Memory Whenever the result of a calculation executed in the MATRIX 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. •...

  • Page 65: Matrix Calculation Examples

    • If you want to copy MatA, for example, perform the following key operation: (MATRIX) (Data) (MatA). • If you want to copy MatAns contents, perform the following to display the MatAns screen: (MATRIX) (MatAns) 2. Press (STO), and then perform one of the following key operations to specify the copy destination: (MatA), (MatB), or...

  • Page 66: Creating A Numerical Table From A Function (Table)

    (MATRIX) (MatA) (MATRIX) (MatA) Creating a Numerical Table from a Function (TABLE) TABLE generates a numerical table for x and f(x) using an input f(x) function. Perform the following steps to generate a numerical table. 1. Press (TABLE) to enter the TABLE Mode. 2.
  • Page 67 Input the increment step (Default = 1). Note: The Step specifies by how much the Start value should be sequentially incremented as the numerical table is generated. If you Step? specify Start = 1 and Step = 1, X sequentially will be assigned the values 1, 2, 3, 4, and so on to generate the numerical table until the End value is reached.

  • Page 68: Vector Calculations (Vector)

    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.

  • Page 69: Vector Answer Memory

    (2) "Ans" stands for "VctAns". Note: "VctAns" stands for "Vector Answer Memory". See "Vector Answer Memory" for more information. Vector Answer Memory Whenever the result of a calculation executed in the VECTOR Mode is a vector, the VctAns screen will appear with the result. The result also will be assigned to a variable named "VctAns".

  • Page 70: Vector Calculation Examples

    • If you want to copy VctA, for example, perform the following key operation: (VECTOR) (Data) (VctA). • If you want to copy VctAns contents, perform the following to display the VctAns screen: (VECTOR) (VctAns) 2. Press (STO), and then perform one of the following key operations to specify the copy destination: (VctA), (VctB), or...
  • Page 71 Example 7: Determine the angle formed by VctA and VctB to three , which becomes θ = cos decimal places (Fix 3). (Angle unit: Deg) (A∙B) (A∙B) (cosθ = |A||B| |A||B| (SETUP) (Fix) (VECTOR) (VctA) (VECTOR) (Dot) (VECTOR) (VctB) (Abs) (VECTOR) (VctA) (Abs)

  • Page 72: Technical Information

    Technical Information Errors The calculator will display an error message whenever an error occurs for any reason during a calculation. There are two ways to exit an error message display: Pressing to display the location of the error, or pressing to clear the message and calculation.
  • Page 73 • Your input exceeds the allowable input range (particularly when using functions). • The calculation you are performing contains an illegal mathematical operation (such as division by zero). Action: • Check the input values, reduce the number of digits, and try again. •...
  • Page 74 • You are trying to perform a calculation with matrices or vectors whose dimensions do not allow that type of calculation. Action: • Specify the dimension of the matrix or vector and then perform the calculation again. • Check the dimensions specified for the matrices or vectors to see if they are compatible with the calculation.

  • Page 75: Before Assuming Malfunction Of The Calculator

    Action: • Try increasing the tol value. Note that this also decreases solution precision. Before Assuming Malfunction of the Calculator... Perform the following steps whenever an error occurs during a calculation or when calculation results are not what you expected. If one step does not correct the problem, move on to the next step.

  • Page 76: Calculation Priority Sequence

    3. Remove the battery, and then load a new battery with its plus (+) and minus (-) ends facing correctly. 4. Replace the cover. 5. Initialize the calculator: (CLR) (All) (Yes). • Do not skip the above step! Calculation Priority Sequence The priority sequence of input calculations is evaluated in accordance with the rules below.

  • Page 77: Calculation Ranges, Number Of Digits, And Precision

    Permutation (nPr), combination (nCr), complex number polar coordinate symbol (∠) Dot product (•) Multiplication (×), division (÷) Addition (+), subtraction (-) and (logical operator) or, xor, xnor (logical operators) Note • When squaring a negative value (such as -2), the value being squared must be enclosed in parentheses ( ).

  • Page 78: Function Calculation Input Ranges And Precision

    Function Calculation Input Ranges and Precision Functions Input Range 0 ≦ |x| < 9 × 10 0 ≦ |x| < 157079632.7 sinx 0 ≦ |x| < 1 × 10 cosx Same as sinx, except when |x| = (2n-1) × Same as sinx, except when |x| = (2n-1) × tanx π/2.
  • Page 79 0 ≦ x ≦ 69 (x is an integer) 0 ≦ n < 1 × 10 , 0 ≦ r ≦ n (n, r are integers) 1 ≦ {n!/(n-r)!} < 1 × 10 0 ≦ n < 1 × 10 , 0 ≦...

  • Page 80: Specifications

    π form. It also can cause calculation results that should be in decimal form to appear in π form. Specifications fx-570ES PLUS Power Requirements: AAA-size battery R03 (UM-4) × 1 Approximate Battery Life:...

  • Page 81: Verifying The Authenticity Of Your Calculator

    Approximate Weight: 95 g (3.4 oz) including the battery Verifying the Authenticity of Your Calculator Use the steps below to verify that your calculator is a genuine CASIO calculator. 1. Press 2. Press • This displays the information below. - Calculator ID number (24-character string) - QR Code for accessing the Worldwide Education Service (https://wes.casio.com/calc/)

  • Page 82: Frequently Asked Questions

    (Setup) (Yes). ■ When I execute a function calculation, why do I get a calculation result that is completely different from older CASIO calculator models? → With a Natural Textbook Display model, the argument of a function that uses parentheses must be followed by a closing parenthesis. Failing to...
  • Page 83 Older (S-V.P.A.M.) Model: 15.5 Natural Textbook Display Model: (LineIO) 15.5 Failure to press here as shown below will result in calculation of sin 0.7071067812...
  • Page 84 © 2019 CASIO COMPUTER CO., LTD.

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