User manual CASIO FX-P401

[. . . ] Never slide the display end of the unit into the cover. . . . . . 1 . . . . . 2 E-1 Safety Precautions Be sure to read the following safety precautions before using this calculator. Keep this manual handy for later reference. Caution This symbol is used to indicate information that can result in personal injury or material damage if ignored. Batteries · After removing the battery from the calculator, put it in a safe place where it will not get into the hands of small children and accidentally swallowed. · 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. [. . . ] 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. u Norm 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. u Norm 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. For details, see "Order of Operations. " · It is not necessary to enclose a negative exponent within parentheses. sin 2. 34 10­5 S 2. 34 e D 5 · Example 1: 3 (5 10­9) 1. 5 10­8 3-5eD9= · Example 2: 5 (9 7) 80 5-R9+7T= · You can skip all T operations before =. k Fraction Operations uFraction Calculations · Values are displayed in decimal format automatically whenever the total number of digits of a fractional value (integer + numerator + denominator + separator marks) exceeds 10. E-11 · Example 1: 2 3 1 5 13 15 2C3+1C5= 1 · Example 2: 3 4 2 11 1 4 3 12 3C1C4+ 1C2C3= 2 · Example 3: 4 1 · Example 4: 2 13 15. 00 4 11 12. 00 2C4= 1 2 1. 6 2. 1 1 C 2 + 1. 6 = · Results of calculations that mix fraction and decimal values are always decimal. uDecimal Fraction Conversion · Use the operation shown below to convert calculation results between decimal values and fraction values. · Note that conversion can take as long as two seconds to perform. 1(Fix) 3 200 \ 7 = 400. 00000 28. 57100 400. 00000 (Internal calculation continues using 12 digits. ) - 14 = The following performs the same calculation using the specified number of decimal places. 200 \ 7 = (Internal rounding) 28. 57100 28. 57100 399. 99400 AQ - 14 = · Press 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. E-20 · Example 2: To convert rectangular coordinates (1, 3) to polar coordinates (r, ) (Rad) r 2 1. 047197551 f1P L3T= 0o · Press 0 n to display the value of r, or 0 o to display the value of . k Engineering Notation Calculations · Example 1: To convert 56, 088 meters to kilometers 56. 088 10 3 (km) 56088 = J · Example 2: To convert 0. 08125 grams to milligrams 81. 25 10 ­3 (mg) 0. 08125 = J Statistical Calculations Standard Deviation SD REG SD Use the F key to enter the SD Mode when you want to perform statistical calculations using standard deviation. SD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F 2 · In the SD Mode and REG Mode, the | key operates as the S key. · Always start data input with A B 1 (Scl) = to clear statistical memory. <x-data> S · Input data is used to calculate values for n, x, x2, o, n and n-1, which you can recall using the key operations noted nearby. E-21 To recall this type of value: Perform this key operation: x2 x n o n n-1 AU1 AU2 AU3 AX1 AX2 AX3 · Example: To calculate n 1, n, o, n, x, and x2 for the following data : 55, 54, 51, 55, 53, 53, 54, 52 In the SD Mode: A B 1 (Scl) = (Stat clear) 55 S n= SD 1. Each time you press S to register your input, the number of data input up to that point is indicated on the display (n value). 54 S 51 S 55 S 53 S S 54 S 52 S Sample Standard Deviation (n 1) = 1. 407885953 Population Standard Deviation (n) = 1. 316956719 Arithmetic Mean (o) = 53. 375 Number of Data (n) = 8 Sum of Values (x) = 427 Sum of Squares of Values (x2 ) = 22805 AX3= AX2= AX1= AU3= AU2= AU1= Data Input Precautions · S S inputs the same data twice. · You can also input multiple entries of the same data using A G. · You can perform the above key operations in any order, and not necessarily that shown above. · While inputting data or after inputting data is complete, you can use the [ and ] keys to scroll through data you have input. If you input multiple entries of the same data using A G to specify the data frequency (number of data items) as described above, scrolling through data shows both the data item and a separate screen for the data frequency (Freq). Input the new value and then press the = key to replace the old value with the new one. This also means that if you want to perform some other operation (calculation, recall of statistical calculation results, etc. ), you should always press the t key first to exit data display. [. . . ] Example: ( ­2)4 = 16 ­24 = ­16 E-30 k Stacks This calculator uses memory areas, called "stacks, " to temporarily store values (numeric stack) and commands (command stack) according to their precedence during calculations. A stack error (Stack ERROR) occurs whenever you try to perform a calculation that is so complex that the capacity of a stack is exceeded. · Example: 1 123 2 4 3 56 4 7 5 Numeric Stack 1 2 2 3 4 5 3 4 5 4 Command Stack 1 2 3 4 5 6 7 · Calculations are performed in sequence according to "Order of Operations. " Commands and values are deleted from the stack as the calculation is performed. E-31 k Input Ranges Internal digits: 12 Accuracy*: As a rule, accuracy is ±1 at the 10th digit. Functions sinx DEG 0 RAD 0 GRA 0 cosx DEG 0 RAD 0 GRA 0 tanx Input Range x x x x x x 4. 499999999 1010 785398163. 3 4. 999999999 1010 4. 500000008 1010 785398164. 9 5. 000000009 1010 DEG Same as sinx, except when x = (2n-1) 90. [. . . ]