User manual CASIO FX-82D

[. . . ] · Keep batteries out of the reach of small children. If accidently swallowed, consult with a physician immediately. · Never charge batteries, try to take batteries apart, or allow batteries to become shorted. Never expose batteries to direct heat or dispose of them by incineration. [. . . ] · The COMP, SD, and REG modes can be used in combination with the angle unit modes. · Be sure to check the current calculation mode (SD, REG, COMP) and angle unit mode (DEG, RAD, GRA) before beginning a calculation. E-8 k Input Capacity · The memory area used for calculation input can hold 79 "steps. " Whenever you input the 73rd step of any calculation, the cursor changes from "_" to "k" to let you know memory is running low. If you still need to input more, you should divide your calculation into two or more parts. k Making Corrections During Input · Use e and r to move the cursor to the location you want. · Press [ to delete the number or function at the current cursor position. · Press A K to change to an insert cursor t. Inputting something while the insert cursor is on the display inserts the input at the insert cursor position. · Press e, r, A K, or = returns to the normal cursor from the insert cursor. k Replay Function · Pressing r or e recalls the last calculation you performed. You can then make any changes you want in the calculation and re-execute it. · Pressing t does not clear Replay memory, so you can recall the last calculation even after you press t. · Replay memory is cleared whenever you start a new calculation, change to another mode, or turn off power. 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. E-9 k Exponential Display Formats This calculator can display up to 10 digits. For other models, press F F F 3 1. k ENG Calculations · Example 1: To convert 56, 088 meters to kilometers 56088 = J 56. 088003 · Example 2: To convert 0. 08125 grams to milligrams 0. 08125 = J 81. 25­03 E-17 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 mode) x y 60°) A F 2 P 60 T = 0o 1. 00 R 1. 73205080800 · 0 n, 0 o swaps displayed value with value in memory. · Example 2: To convert rectangular coordinates (1, 3) to polar coordinates (r, ) (RAD mode) r f1P L3T= 2. 00 T 0 o 1. 04719755100 · 0 n, 0 o swaps displayed value with value in memory. k Permutation · Example: 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 value (1234 is allowed, but 1123 is not). 7Am 4= 840. k Combination · Example: To determine how many different 4-member groups can be organized in a group of 10 individuals 10 n 4 = (fx-85W: A n) E-18 210. Statistical Calculations k Standard Deviation (SD Mode) · Press F F 1 (fx-85W) to enter the SD Mode for statistical calculations using standard deviation. · Data input always starts with A m = to clear statistical memory. · Input data is used to calculate values for 0 1 x2 n, x, x2, o, n and n-1 which you can 0 2 x recall using the key operations noted 0 k n nearby. AM o A A n A N n-1 · Example: To calculate n 1, n, o, n, x, and x2 for the following data : 55, 54, 51, 55, 53, 53, 54, 52 Enter SD Mode fx-85W: F F 1 Other models: F 2 A m = (Memory Clear) 55 S 54 S 51 S 55 S 53 S S 54 S 52 S (Sample Standard Deviation n 1) SD 52. 00 A N= A A= AM = 0k 0H 0G 1. 40788595300 1. 31695671900 53. 37500 8. 00 427. 00 22805. 00 (Population Standard Deviation n) (Arithmetic Mean o) (Number of Data (Sum of Values n) x) x 2) (Sum of Squares of Values E-19 Data Input Precautions · S S inputs the same data twice. · You can also input multiple entries of the same data using A G. To input the data 110 ten times, for example, press 110 A G 10 S. · The above results can be obtained in any order, and not necessarily that shown above. · To delete data you have just input, press A U. k Regression Calculations (REG Mode) · Press F F 2 (fx-85W) to enter the REG mode and then select one of the following regression types. For other models, press F 3. 1: 2: 3: r 1: r 2: r 3: Linear regression Logarithmic regression Exponential regression Power regression Inverse regression Quadratic regression · Data input always starts with A m = to clear statistical memory. [. . . ] The numeric stack has 10 levels and the command stack has 24 levels. A stack error (Stk ERROR) occurs whenever you try to perform a calculation that is so complex that the capacity of a stack is exceeded. E-27 k Power Supply The type of battery you should use depends on the model number of your calculator. < fx-85W/ fx-85WA / fx-300W> The TWO WAY POWER system actually has two power supplies: a solar cell and a G13 Type (LR44) button battery. [. . . ]