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Casio fx-82AU PLUS User Manual

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fx-82AU PLUS
User's Guide
CASIO Worldwide Education Website



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  Summary of Contents for Casio fx-82AU PLUS

  • Page 1 PLUS User’s Guide CASIO Worldwide Education Website CASIO EDUCATIONAL FORUM
  • Page 2: Table Of Contents

    Contents Important Information ............. 2 Sample Operations ..............2 Initializing the Calculator ............2 Safety Precautions ..............2 Handling Precautions .............. 2 Removing the Hard Case ............3 Turning Power On and Off ............3 Adjusting Display Contrast ............ 3 Key Markings ................
  • Page 3: Important Information

    • The contents of this manual are subject to change without notice. • 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 4: Removing The Hard Case

    • Never try to take the calculator apart. • Use a soft, dry cloth to clean the exterior of the calculator. • Whenever discarding the calculator or batteries, be sure to do so in accordance with the laws and regulations in your particular area. * Company and product names used in this manual may be registered trademarks or trademarks of their respective owners.
  • Page 5: Reading The Display

    Reading the Display The display of the calculator shows expressions you input, calculation results, and various indicators. Input expression Indicators Math Math Math Math Calculation result • If a indicator appears on the right side of the calculation result, it means the displayed calculation result continues to the right.
  • Page 6: Using Menus

    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. Using Menus Some of the calculator’s operations are performed using menus. Pressing , for example, will display a menu of applicable functions.
  • Page 7: Inputting Expressions And Values

    Specifies degrees, radians or grads as the angle unit for value input and calculation result display. Note: In this manual, the symbol next to a sample operation indicates degrees, while the symbol indicates radians. Norm Specifies the number of digits for display of a calculation result.
  • Page 8: Calculation Priority Sequence

    sin30 (30 + 10 3) = 120 Input of the closing parenthesis is required for sin, sinh, and other functions that include parentheses. These multiplication symbols ( ) can be omitted. A multiplication symbol can be omitted when it occurs immediately before an opening parenthesis, immediately before sin or other function that includes parentheses, immediately before the Ran# (random number) function, or immediately before a variable (A, B, C, D, M, X, Y),...
  • Page 9 STAT Mode estimated values ( , , Multiplication where the multiplication sign is omitted Permutation (nPr), combination (nCr) Multiplication, division ( , ÷) 10th Addition, subtraction (+, –) Inputting with Natural Display Selecting Natural Display makes it possible to input and display fractions −1 and certain functions ( , 10 ,...
  • Page 10: Toggling Calculation Results

    This capability can be used with the following functions: ( ), 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.
  • Page 11: Percent Calculations

    2 + 1 = 7 1 = 1 4 − 3 Note: • Mixing fractions and decimal values in a calculation while Linear Display is selected will cause the result to be displayed as a decimal value. • Fractions in calculation results are displayed after being reduced to their lowest terms.
  • Page 12: Using Engineering Notation

    Multi-Statements You can use the colon character (:) to connect two or more expressions and execute them in sequence from left to right when you press 3 + 3 : 3 (:) 3 Using Engineering Notation A simple key operation transforms a displayed value to engineering notation.
  • Page 13 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. To divide the result of 3 4 by 30 (Continuing) 123 + 456 = 579 789 –...
  • Page 14: Function Calculations

    Function Calculations For actual operations using each function, see the “Examples” section following the list below. is displayed as 3.141592654, but = 3.14159265358980 is used for internal calculations. is displayed as 2.718281828, but = 2.71828182845904 is used for internal calculations. −1 −1 −1...
  • Page 15 Rnd : The argument of this function is made a decimal value and then rounded in accordance with the current number of display digits setting (Norm, Fix, or Sci). With Norm 1 or Norm 2, the argument is rounded off to 10 digits. With Fix and Sci, the argument is rounded off to the specified digit.
  • Page 16: Statistical Calculations (Stat)

    To convert rectangular coordinates ( ' 2 , ' 2 ) to polar coordinates r=2,θ=45 (Pol) (Pol) θ= 45 To convert polar coordinates ( ' 2 , 45°) to rectangular coordinates X=1, Y=1 (Rec) (,) 45 40320 (5 + 3) ! = 40320 |2 –...
  • Page 17 Paired-variable (X, Y), quadratic regression ( _+CX = A + B Paired-variable (X, Y), logarithmic regression (ln X) = A + Bln Paired-variable (X, Y), exponential regression Paired-variable (X, Y), exponential regression B^X) • = AB X^B) Paired-variable (X, Y), power regression •...
  • Page 18 To delete a line: In the Stat Editor, move the cursor to the line that you want to delete and then press To insert a line: In the Stat Editor, move the cursor to the location where you want to insert the line and then perform the following key operation: (STAT) (Edit) (Ins).
  • Page 19: Calculation Ranges, Number Of Digits, And Precision

    To calculate the linear regression and logarithmic regression correlation coefficients for the following paired-variable data and determine the regression formula for the strongest correlation: ( = (20, 3150), (110, 7310), (200, 8800), (290, 9310). Specify Fix 3 (three decimal places) for results. (SETUP) (STAT) (OFF)
  • Page 20 In general, 1 at the 10th digit for a single Precision calculation. Precision for exponential display is 1 at the least significant digit. Errors are cumulative in the case of consecutive calculations. Function Calculation Input Ranges and Precision Functions Input Range 157079632.7 157079632.7 Same as sin...
  • Page 21: Errors

    °’ ” The display seconds value is subject to an error of 1 at the second decimal place. Decimal Sexagesimal Conversions 0°0 0˝ 9999999°59 59˝ 0: –1 = 0: are integers) However: –1 0, –1 = 0: +1, 2 are integers) However: –1 Total of integer, numerator, and denominator must be 10 digits or less (including division marks).
  • Page 22: Before Assuming Malfunction Of The Calculator

    Math Math Clearing the Error Message While an error message is displayed, press to return to the calculation screen. Note that this also clears the calculation that contained the error. Error Messages Math ERROR Cause: • The intermediate or final result of the calculation you are performing exceeds the allowable calculation range.
  • Page 23: Replacing The Battery

    3. If the above steps do not correct your problem, press the key. This will cause the calculator to perform a routine that checks whether calculation functions are operating correctly. If the calculator discovers any abnormality, it automatically initializes the calculation mode and clears memory contents. For details about initialized settings, see “Configuring the Calculator Setup”.
  • Page 24 (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...