Casio CALCULATOR FX-85GT PLUS manual

E f x - 83GT PLUS f x - 85GT PLUS User’ s Guide CASIO Worldwide Education Website http://edu.casio.com CASIO EDUCATIONAL FORUM http://edu.casio.com/forum/[...]

Contents Impor tant Inf ormation ............................................................. 2 Sample Operations .................................................................. 2 Initializing the Calculator ........................................................ 2 Safety Precautions ............................................................[...]

E-2 Impor tant Infor mation • 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 [...]

E-3 • Do not subject the calculator to excessive impact, pressure, or bending. • Never try to take the calculator apart. • Use a soft, dr y c loth to clean the e xterior of the calculator . • Whenever discar ding the calculator or batteries, be sure to do so in accordance with the la ws and regulations in your particular area. * Company and[...]

E-4 Reading the Display The display of the calculator shows expressions you input, calculation results, and various indicators. Input expression Indicators 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 C and B to scroll the calcula[...]

E-5 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  or E , for example, will display a menu of applicable functions. The[...]

E-6  Deg  Rad  Gra Specifies degrees, radians or grads as the angle unit for value input and calculation result display. Note: In this manual, the B symbol next to a sample operation indicates degrees, while the * symbol indicates radians.  Fix  Sci  Norm Specifies the number of digits for display of a calculation result. Fix: The[...]

E-7 Inputting Expr essions and V alues Basic Input Rules Calculations can be input in the same form as they are written. When you press  the priority sequence of the input calculation will be evaluated automatically and the result will appear on the display. 4 s sin30 s ( 3 0+1 0 s 3) = 120 4  Q 30  30  10  3  * [...]

E-8 5th Negative sign (–) Note: When squaring a negative value (such as –2), the value being squared must be enclosed in parentheses (   2  7;  ). Since x 2 has a higher priority than the negative sign, inputting  2 7  would result in the squaring of 2 and then appending a negative sign to the result. Always keep the priority [...]

E-9  As shown above, the value or expression to the right of the cursor after ) (INS) are pressed becomes the argument of the function that is specified next. The range encompassed as the argument is everything up to the first open parenthesis to the right, if there is one, or everything up to the first function to the right (sin(30), log2(4)[...]

E-10  7 ( I • ) 3 To input 1.428571428571... (1.4 • 28571 • )  1   7 ( I • ) 428571 To calculate 1.0 • 21 • + 2.3 • 12 •  1   7 ( I • ) 021 C  2   7 ( I • ) 312  Calculation result displayed as recurring decimal value: 5 Note: • You can specify up to 14 decimal places for the recurring decimal [...]

E-11 7 1 = 0.1 • 42857 • = 0.1428571429 (Norm 1)  1  7  Display as recurring decimal: 5 Decimal value according to Norm 1 setting: 5 Return to initial display format (fraction): 5 1÷7= 7 1 = 0.1 • 42857 • = 0.1428571429 (Norm 1)  1  7   Display as fraction: 5 Display as recurring decimal: 5 Return to initial display fo[...]

E-12 Return to initial display format (fraction): 5 1÷7= 0.1428571429 (Norm 1) = 0.1 • 42857 • = 7 1 1 1  7  Display as fraction: 5 Display as recurring decimal: 5 Return to initial display format (Norm 1): 5 Conditions f or Displaying a Calculation Result as a Recurring Decimal If a calculation result satisfies the following conditions,[...]

E-13 To confirm the following: 0.1 • 23 • = 999 123 , 0.1 • 234 • = 9999 1234 , 0.1 • 2345 • = 99999 12345  123  999  5 1234  9999  5 12345  99999  5 T oggling Calculation Results While Natural Display is selected, each press of 5 will toggle the currently displayed calculation result between its fraction form and d[...]

E-14 Important: • Depending on the type of calculation result that is on the display when you press the 5 key, the conversion process may take some time to perform. • With certain calculation results, pressing the 5 key will not convert the displayed value. • When ON is selected for Rdec on the setup menu, pressing 5 will switch the calculati[...]

E-15 Degree, Minute, Second (Se xagesimal) 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. You also can convert between sexagesimal and decimal. The followin[...]

E-16 3 + 3 = 6 3  3  6 (Scrolls back.) D 4 (Scrolls back again.) D 2 Note: Calculation history data is all cleared whenever you press  , when you change to a different calculation mode, when you change the display format, or whenever you perform any reset operation. Repla y While a calculation result is on the display, you can press B or C[...]

E-17 Independent Memory (M) You can add calculation results to or subtract results from independent memory. The “M” appears on the display when there is any value other than zero stored in independent memory. To clear the contents of M 0 B (STO) J (M) 0 To add the result of 10 s 5 to M (Continuing) 10  5 J 50 To subtract the result of 10 [...]

E-18 Function Calculations For actual operations using each function, see the “Examples” section following the list below.   : P is displayed as 3.141592654, but P = 3.14159265358980 is used for internal calculations. e : e is displayed as 2.718281828, but e = 2.71828182845904 is used for internal calculations. sin, cos, tan, sin −1 , c[...]

E-19 RanInt# : For input of the function of the form RanInt#( a , b ), which generates a random integer within the range of a to b . See 12 . n P r , n C r : Permutation ( n P r ) and combination ( n C r ) functions. See 13 . Rnd : The argument of this function is made a decimal value and then rounded in accordance with the current number of displa[...]

E-20 To calculate ' 2 × 3 (= 3 ' 2 = 4.242640687...) to three decimal places (Fix 3)  (SETUP)  (Fix)    2 C  3  3 ' 2   4.243 1  2   3  4.243 To convert rectangular coordinates ( ' 2 , ' 2 ) to polar coordinates B    (Pol)  2 C   (,)  2 C   r=2, Ƨ =45 1 [...]

E-21 Statistical Calculations (ST A T) To start a statistical calculation, perform the key operation   (STAT) to enter the STAT Mode and then use the screen that appears to select the type of calculation you want to perform. T o select this type of statistical calculation: (Regression formula shown in parentheses) Press this key: Single-varia[...]

E-22 Important: • All data currently input in the Stat Editor is deleted whenever you exit the STAT Mode, switch between the single-variable and a paired- variable statistical calculation type, or change the Stat Format setting on the setup menu. • The following operations are not supported by the Stat Editor: ; , ; (M–), B (STO). Pol, [...]

E-23  (SETUP) A  (STAT)  (ON)   (STAT)  (1-VAR) 1  2  3  4  5  AC 1  2  3  2    (STAT)  (Var)  ( M )    (STAT)  (Var)  ( S x )  Results: Mean: 3 Population Standard Deviation: 1.154700538 To calculate the linear regression and logarithmic regression correlation coef[...]

E-24 Cr eating a Number T able fr om a Function (T ABLE) TABLE generates a number table for x and f ( x ) using an input f ( x ) function. Perform the following steps to generate a number table. 1. Press   (TABLE) to enter the TABLE Mode. 2. Input a function in the format f ( x ), using the X variable. • Be sure to input the X variable ( # [...]

E-25 Using VERIFY (VERIF) VERIFY is a function you can use to verify whether an input equality or inequality is true (indicated by TRUE) or false (indicated by FALSE). The following shows the general procedure for using VERIFY. To verify whether 4 ' 9 = 12 is true  1. Press   (VERIF) to enter the VERIFY Mode. 2. Input 4 ' 9 = 12.[...]

E-26 • An expression in which multiple relational operators that are not oriented in the same direction (Example: 5  6 > 4) • An expression that contains two of the following operators in any combination (Example: 4  6 p 8) • An expression that contains consecutive relational operators (Example: 5 > 9) VERIFY Mod[...]

E-27 cos x DEG 0  x  9 s 10 9 RAD 0  x  157079632.7 GRA 0  x  1 s 10 10 tan x DEG Same as sin x , except when x =( 2 n –1) s 90. RAD Same as sin x , except when x =( 2 n –1) sP /2. GRA Same as sin x , except when x =( 2 n –1) s 100. sin –1 x 0  x  1 cos –1 x ta[...]

E-28 x ' y y   0: x & 0, –1 s 10 100  1/ x log y  100 y  =0 : x  0 y  0: x = 2 n +1, 2 n +1 m ( m & 0; m , n are integers) However: –1 s 10 100  1/ x log y   100 a b / c Total of integer, numerator, and denominator must be 10 digits or less (including division marks). RanI[...]

E-29 Err or Messages Math ERROR Cause: • The intermediate or final result of the calculation you are performing exceeds the allowable calculation range. • Your input exceeds the allowable input range (particularly when using functions). • The calculation you are performing contains an illegal mathematical operation (such as division by zero).[...]

Replacing the Batter y A low battery is indicated by a dim display, even if contrast is adjusted, or by failure of figures to appear on the display immediately after you turn on the calculator. If this happens, replace the battery with a new one. Important: Removing the battery will cause all of the calculator’s memory contents to be deleted. 1. [...]

Manufacturer: CASIO COMPUTER CO., LTD. 6-2, Hon-machi 1-chome Shibuya-ku, Tokyo 151-8543, Japan Responsible within the European Union: CASIO EUROPE GmbH Casio-Platz 1 22848 Norderstedt, Germany This mark applies in EU countries only. I What is the difference between Ans memory , independent memory , and variab le memor y? Each of these types of mem[...]