User manual CASIO FX-82LB

[. . . ] Never expose batteries to direct heat or dispose of them by incineration. · Misuse of batteries can cause them to leak and damage nearby items, and can create the risk of fire and personal injury. · Always make sure that the battery's positive k and negative l ends are facing correctly when you load it into the calculator. · Remove the battery if you do not plan to use the calculator for a long time. [. . . ] · Pressing t does not clear replay memory, so you can recall the last calculation even after you press t. · Replay memory capacity is 128 bytes for storage of both expressions and results. When you press the 5 key When you initialize modes and settings by pressing A B 2(or 3) = When you change from one calculation mode to another When you turn off the calculator. k Error Locator · Pressing r or e after an error occurs displays the calculation with the cursor positioned at the location where the error occurred. k Multi-statements A multi-statement is an expression that is made up of two or more smaller expressions, which are joined using a colon ( : ). · Example: To add 2 + 3 and then multiply the result by 4 2+3 p\g- 4= 2+3 5. 20. Disp = Ans×4 E-9 k Exponential Display Formats This calculator can display up to 10 digits. In the case of decimal values, you can select between two formats that determine at what point exponential notation is used. · To change the exponential display format, press the F key a number of times until you reach the exponential display format setup screen shown below. F i x Sc i No r m 1 2 3 · Press 3. On the format selection screen that appears, press 1 to select Norm 1 or 2 for Norm 2. uNorm 1 With Norm 1, exponential notation is automatically used for integer values with more than 10 digits and decimal values with more than two decimal places. uNorm 2 With Norm 2, exponential notation is automatically used for integer values with more than 10 digits and decimal values with more than nine decimal places. · All of the examples in this manual show calculation results using the Norm 1 format. k Decimal Point and Separator Symbols You can use the display setup (Disp) screen to specify the symbols you want for the decimal point and 3-digit separator. · To change the decimal point and separator symbol setting, press the F key a number of times until you reach the setup screen shown below. Disp 1 · Display the selection screen. 1r E-10 · Press the number key ( 1 or 2) that corresponds to the setting you want to use. 1(Dot): Period decimal point, comma separator 2(Comma): Comma decimal point, period separator k Initializing the Calculator · Perform the following key operation when you want to initialize the calculation mode and setup, and clear replay memory and variables. A B 3(All) = Basic Calculations k Arithmetic Calculations COMP Use the F key to enter the COMP Mode when you want to perform basic calculations. F 1 · Negative values inside of calculations must be enclosed within parentheses. · = 3. 14159265359 k Trigonometric/Inverse Trigonometric Functions · To change the default angle unit (degrees, radians, grads), press the F key a number of times until you reach the angle unit setup screen shown below. Deg Rad G r a 1 2 3 · Press the number key (1, 2, or 3 ) that corresponds to the angle unit you want to use. (90° = 2 radians = 100 grads) · Example 1: sin 63 °52o41 0. 897859012 q . . . . . 1 (Deg) S 63 I 52 I 41 I = · Example 2: cos ( rad) 3 q . . . . . 2 (Rad) WR Ax\3 T= 0. 5 E-18 · Example 3 : cos 1 2 2 0. 25 (rad)( (rad)) 4 q . . . . . 2 (Rad) A V RL2 \ 2T =g \ A x = · Example 4: tan 1 0. 741 36. 53844577 ° q . . . . . 1 (Deg) A g 0. 741 = k Hyperbolic/Inverse Hyperbolic Functions · Example 1: sinh 3. 6 · Example 2: sinh 1 18. 28545536 4. 094622224 M S 3. 6 = M A j 30 = 30 k Common and Natural Logarithms/ Antilogarithms · Example 1: log 1. 23 0. 089905111 R 1. 23 = T 90 = TpP= A U 10 = A Q 1. 5 = 2W 4= · Example 2: In 90 (= loge 90) = 4. 49980967 ln e · Example 3: e10 · Example 4: 101. 5 · Example 5: 24 1 22026. 46579 31. 6227766 16 k Square Roots, Cube Roots, Roots, Squares, Cubes, Reciprocals, Factorials, Random Numbers, , and Permutation/Combination · Example 1: 2 3 5 5. 287196909 L2+L3-L5= E-19 · Example 2: 3 5 3 27 1 ­1. 290024053 A D 5 + A D R D 27 T = · Example 3: 7 123 ( = 123 7 ) 1. 988647795 7 A H 123 = 123 + 30 K = 12 N = · Example 4: 123 · Example 5: 123 · Example 6: 1 1 3 30 2 1023 1728 1 4 12 R3a, 4aTa= 8Af= · Example 7: 8! 40320 · Example 8: To generate a random number between 0. 000 and 0. 999 AM= · Example 9: 3 0. 66400 3Ax= (The above value is a sample only. Results differ each time. ) 9. 424777961 · Example 10: To determine how many different 4-digit values can be produced using the numbers 1 through 7 · Numbers cannot be duplicated within the same 4-digit (840) value (1234 is allowed, but 1123 is not). 7Am4= · Example 11: To determine how many different 4-member groups can be organized in a group of 10 individuals (210) 10 n 4 = k Angle Unit Conversion · Press A v to display the following menu. D R G 12 3 · Pressing 1, 2, or 3 converts the displayed value to the corresponding angle unit. E-20 · Example: To convert 4. 25 radians to degrees q . . . . . 25 r 4. 25 A v 2(R) = 243. 5070629 k Coordinate Conversion (Pol (x, y), Rec (r, )) · Calculation results are automatically assigned to variables E and F. · Example 1: To convert polar coordinates (r 2, to rectangular coordinates (x, y) (Deg) x y 60°) 1 1. 732050808 A F 2 P 60 T = 0o · Press 0 n to display the value of x, or 0 o to display the value of y. [. . . ] Press t to clear the error, or press e or r to display the calculation and correct the problem. E-28 Math ERROR · Causes · Calculation result is outside the allowable calculation range. · An attempt to perform a function calculation using a value that exceeds the allowable input range. · An attempt to perform an illogical operation (division by zero, etc. ) · Action · Check your input values and make sure they are all within the allowable ranges. [. . . ]