User manual CASIO FX-85WA

[. . . ] 2 Handling Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Removing the Hard Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Turning Power On and Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Adjusting Display Contrast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] To switch a calculation result between improper fraction and mixed fraction form: Perform the following key operation: ( ) To switch a calculation result between fraction and decimal form: Press . Percent Calculations Inputting a value and pressing a percent. 150 20% = 30 (%) causes the input value to become 150 20 (%) 30 75 2875 2625 Calculate what percentage of 880 is 660. (2625) 3500 3500 (%) 15 (%) 25 (%) C E-10 Degree, Minute, Second (Sexagesimal) Calculations Performing an addition or subtraction operation between sexagesimal values, or a multiplication or division operation between a sexagesimal value and a decimal value will cause the result to be displayed as a sexagesimal value. The following is the input format for a sexagesimal value: {degrees} {minutes} {seconds} . Note: You must always input something for the degrees and minutes, even if they are zero. 2°20´30 + 39´30 = 3°00´00 2 20 30 0 39 30 3°0´0 2°15´18 2. 255 2°15´18 Convert 2°15´18 to its decimal equivalent. 2 15 18 (Converts sexagesimal to decimal. ) (Converts decimal to sexagesimal. ) 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 3 3 (:) 3 3 6 9 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 1. 234×103 1234×100 Transform the value 123 to engineering notation, shifting the decimal point to the left. 123 123 () 0. 123×103 ( ) 0. 000123×106 Calculation History In the COMP Mode, the calculator remembers up to approximately 200 bytes of data for the newest calculation. Note: The following functions cannot be input in consecutive sequence: x2, x3, x , x-1. input 2 Pol, Rec : Pol converts rectangular coordinates to polar coordinates, while Rec converts polar coordinates to rectangular coordinates. Specify the angle unit before Pol(x, y) = (r, ) Rec(r, ) = (x, y) performing calculations. The calculation result for r and and for x and y are each assigned respectively to variables X and Y. Calculation result is displayed in the range of -180° Rectangular Polar 180°. Note that the input method is different depending upon whether you are using Natural Display or Linear Display. The result is displayed as a fraction when Natural Display is selected. RanInt# : For input of the function of the form RanInt#(a, b), which generates a random integer within the range of a to b. C E-14 nPr, nCr : Permutation (nPr) and combination (nCr) functions. See 13 . 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). When Fix 3 is the display digits setting, for example, the result of 10 ÷ 3 is displayed as 3. 333, while the calculator maintains a value of 3. 33333333333333 (15 digits) internally for calculation. [. . . ] Action: Narrow the table calculation range by changing the Start, End, and Step values, and try again. Argument ERROR Cause: A non-integer argument was input for the random number function (RanInt#). Action: Input only integers for the argument. 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. Note that you should make separate copies of important data before performing these steps. [. . . ]