E fx-82AU PLUS II User’s Guide CASIO Worldwide Education Website http://edu.casio.com CASIO EDUCATIONAL FORUM http://edu.casio.
Contents Important Information ............................................................. 2 Sample Operations .................................................................. 2 Initializing the Calculator ........................................................ 2 Safety Precautions .................................................................. 2 Handling Precautions.............................................................. 2 Removing the Hard Case ...............................................
Important Information • The displays and illustrations (such as key markings) shown in this User’s Guide are for illustrative purposes only, and may differ somewhat from the actual items they represent. • 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.
• 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.
Reading the Display The display of the calculator shows expressions you input, calculation results, and various indicators. Input expression Indicators 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. Use e and d to scroll the calculation result display. • If a g indicator appears on the right side of the input expression, it means the displayed calculation continues to the right.
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 N or w, for example, will display a menu of applicable functions. The following are the operations you should use to navigate between menus.
3Deg 4Rad 5Gra Specifies degrees, radians or grads as the angle unit for value input and calculation result display. Note: In this manual, the v symbol next to a sample operation indicates degrees, while the V symbol indicates radians. 6Fix 7Sci 8Norm Specifies the number of digits for display of a calculation result. Fix: The value you specify (from 0 to 9) controls the number of decimal places for displayed calculation results.
4 × sin30 × (30 + 10 × 3) = 120 4 *s 30 )*( 30 + 10 * 3 )= 2 * *1 Math *3 *1 Input of the closing parenthesis is required for sin, sinh, and other functions that include parentheses. 2 * These multiplication symbols (×) can be omitted.
Math = Note: • If the calculation becomes longer than the screen width during input, the screen will scroll automatically to the right and the ] indicator will appear on the display. When this happens, you can scroll back to the left by using d and e to move the cursor. • When Linear Display is selected, pressing f will cause the cursor to jump to the beginning of the calculation, while c will jump to the end.
2+' 2 1+' 2 B Math ' 2 +! 2 ee 1 +! 2 = Important: • Certain types of expressions can cause the height of a calculation formula to be greater than one display line. The maximum allowable height of a calculation formula is two display screens (31 dots × 2). Further input will become impossible if the height of the calculation you are inputting exceeds the allowable limit. • Nesting of functions and parentheses is allowed.
Correcting and Clearing an Expression To delete a single character or function: Move the cursor so it is directly to the right of the character or function you want to delete, and then press Y. In the overwrite mode, move the cursor so it is directly under the character or function you want to delete, and then press Y. To insert a character or function into a calculation: Use d and e to move the cursor to the location where you want to insert the character or function and then input it.
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. To switch a calculation result between improper fraction and mixed fraction form: Perform the following key operation: 1f(<) To switch a calculation result between fraction and decimal form: Press f.
Using Engineering Notation A simple key operation transforms a displayed value to engineering notation. Transform the value 1234 to engineering notation, shifting the decimal point to the right. 1234 = 1234 W 1.234×103 W 1234×100 Transform the value 123 to engineering notation, shifting the decimal point to the left. 123 123 = 1W(←) 0.123×103 1W(←) 0.000123×106 Calculation History In the COMP Mode, you can scroll through calculation history contents using f and c.
(Continuing) 123 + 456 = 579 B 789 – 579 = 210 (Continuing) / 30 = 123 + 456 = Math 789 -G= Variables (A, B, C, D, E, F, X, Y) Your calculator has eight preset variables named A, B, C, D, E, F, X, and Y. You can assign values to variables and also use the variables in calculations.
Prime Factorization In the COMP Mode, you can factor a positive integer up to 10 digits into prime factors up to three digits. To perform prime factorization on 1014 1014 = !e(FACT) When you perform prime factorization on a value that includes a factor that is prime number with more than three digits, the part that cannot be factored will be enclosed in parentheses on the display.
x2, x3, x^, ), #, ", x−1 : Powers, power roots, and reciprocals. Note that the input methods for x^, ), #, and " are different depending upon whether you are using Natural Display or Linear Display. See 7. Note: The following functions cannot be input in consecutive sequence: x2, x3, x^, x−1. If you input 2ww, for example, the final w will be ignored. To 2 input 22 , input 2w, press the d key, and then press w(B).
Examples bv s 30 )= sin−10.5 = 30° bv 1s(sin−1) 0.5 )= 1 sin 30°= 0.5 2 sinh 1 = 1.175201194 cosh–1 1 = 0 0.5 30 wb(sinh) 1 )= 1.175201194 wf(cosh−1) 1 )= 3 π /2 radians = 90°, 50 grads = 45° 0 v (15(π)/ 2 )1G(DRG')c(r)= 50 1G(DRG')d(g)= 90 45 4 To calculate e5 × 2 to three significant digits (Sci 3) 1N(SETUP)7(Sci)3 B b 1i(%) 5 e* 2 = 1i(%) 5 )* 2 = 2.97×102 2.
11 To obtain three random three-digit integers 1000 1.(Ran#)= = = 459 48 117 (Results shown here are for illustrative purposes only. Actual results will differ.) 12 To generate random integers in the range of 1 to 6 S.(RanInt) 1 1)(,) 6 )= = = 2 6 1 (Results shown here are for illustrative purposes only. Actual results will differ.
Paired-variable (X, Y), power regression ( y = AxB) 7(A•X^B) Paired-variable (X, Y), inverse regression 8(1/X) ( y = A + B/x) Pressing any of the above keys (1 to 8) displays the Stat Editor. Note: When you want to change the calculation type after entering the STAT Mode, perform the key operation 11(STAT)1(Type) to display the calculation type selection screen. Inputting Data Use the Stat Editor to input data. Perform the following key operation to display the Stat Editor: 11(STAT)2(Data).
Obtaining Statistical Values from Input Data To obtain statistical values, press A while in the Stat Editor and then recall the statistical variable (σx, Σx2, etc.) you want. Supported statistical variables and the keys you should press to recall them are shown below. For single-variable statistical calculations, the variables marked with an asterisk (*) are available.
1N(SETUP)c3(STAT)2(OFF) 1N(SETUP)6(Fix)3 N2(STAT)2(A+BX) 20 = 110 = 200 = 290 =ce 3150 = 7310 =8800 = 9310= STAT FIX A11(STAT)5(Reg)3(r)= A11(STAT)1(Type)4(In X) A11(STAT)5(Reg)3(r)= A11(STAT)5(Reg)1(A)= A11(STAT)5(Reg)2(B)= Results: Linear Regression Correlation Coefficient: 0.923 Logarithmic Regression Correlation Coefficient: 0.998 Logarithmic Regression Formula: y = –3857.984 + 2357.
2. Input 4' 9 = 12. 4 ! 9 e1 6 (VERIFY) 1 (=)12 • You can select the equality symbol or inequality symbol from the menu that appears when you press 16(VERIFY). 3. To verify, press =. Math You can input the following expressions for verification in the VERIFY Mode. • Equalities or inequalities that include one relational operator 4 = 16, 4 3, π 3, 1 + 2 5, (3 × 6) (2 + 6) × 2, etc.
VERIFY Mode Calculation Examples To verify log2 log3 log4 l 2 )16 (VERIFY) 4 ( ) l 3 )16 (VERIFY) 4 ( ) l 4 )= To verify 0 2 ( 89 ) – 89 B 0 16 (VERIFY) 4 ( ) 8 ' 9 ew- 8 ' 9 = To verify 52 = 25 = 625 B 5 w16 (VERIFY) 1 (=) 25 16 (VERIFY) 1 (=) ! 625 = Calculation Ranges, Number of Digits, and Precision The calculation range, number of digits used for internal calculation, and calculation precision depend on the type of calculation you are performing.
tan–1x sinhx coshx 0 |x| 9.999999999 × 1099 0 |x| 230.2585092 sinh–1x 0 |x| 4.999999999 × 1099 cosh–1x 1 x 4.999999999 × 1099 tanhx 0 |x| 9.999999999 × 1099 tanh–1x 0 |x| 9.999999999 × 10–1 logx/lnx 0 x 9.999999999 × 1099 10x –9.999999999 × 1099 x 99.99999999 ex x ' x2 x –1 3 ' x x! –9.999999999 × 1099 x 230.
• Precision is basically the same as that described under “Calculation Range and Precision”, above. x y , 3', x!, nPr, nCr type functions require consecutive internal • x y, ' calculation, which can cause accumulation of errors that occur with each calculation. • Error is cumulative and tends to be large in the vicinity of a function’s singular point and inflection point. • The range for calculation results that can be displayed in π form when using Natural Display is |x| 106.
Action: • Check the input values, reduce the number of digits, and try again. • When using independent memory or a variable as the argument of a function, make sure that the memory or variable value is within the allowable range for the function. Stack ERROR Cause: The calculation you are performing has caused the capacity of the numeric stack or the command stack to be exceeded. Action: • Simplify the calculation expression so it does not exceed the capacity of the stack.
1. Press 1A(OFF) to turn off the calculator. 2. Remove the cover as shown in the illustration and replace the battery, taking care that its plus (+) and minus (–) ends are facing correctly. 3. Replace the cover. 4. Initialize the calculator: O19(CLR)3(All)=(Yes) • Do not skip the above step! Screw Screw Specifications Power Requirements: AAA-size battery R03 (UM-4) × 1 Approximate Battery Life: 17,000 hours (continuous display of flashing cursor) Power Consumption: 0.
k 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 press ) after the argument to close the parentheses may cause unwanted values or expressions to be included as part of the argument.
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