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Casio FX-991ES Support Question

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Question posted by masudbuet07 on August 13th, 2012

Problem In Display.

My calculator(Casio FX-991ES) shows mirror images of the text & no. in display. I am using the calculator with the help of a mirror to see the real text & no. But the calculation is correct. How can i solve the problem?

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Related Casio FX-991ES Manual Pages

User Guide - Page 4

... item that this manual are for the angle unit. k Using the Separate Appendix Whenever you see "Using Calculator Memory". Rad : Specify Radian for special, collateral, incidental,...initialize the calculator and return the calculation mode and setup to their initial default settings. Moreover, CASIO Computer Co., Ltd. Initializing the Calculator Perform the following shows an ...
User Guide - Page 6

..., total failure of the display, and shortening of the calculator with this , it might be exposed to very high temperatures. Handling Precautions • Be sure to press the O key before wiping the calculator. Always keep written records of the calculator. Never use thinner, benzene or other tight-fitting clothing where it might be splashed by...
User Guide - Page 7

...(SETUP)c6(]CONT') This displays the contrast adjustment screen. Use d and e to turn off the calculator. Important! • If adjusting display contrast does not improve display readability, it , and then affix the hard case to the back of the calculator as shown in the illustration below. E-5 Before Using the Calculator k Removing the Hard Case Before using d and e while the...
User Guide - Page 8

... radians. This indicator appears after you press a key. The default angle unit is a value stored in the VECTOR Mode. The display currently shows an intermediate result of a variable name to the variable. Calculation history memory data is available and can be exited and this indicator will disappear when you press 1t(STO). Example...
User Guide - Page 9

... the number key that takes a long time to execute, the display may show only the above indicators (without any value) while it performs the calculation internally. Select this type of operation: General calculations Complex number calculations Statistical and regression calculations Calculations involving specific number systems (binary, octal, decimal, hexadecimal) Equation solution...
User Guide - Page 10

... results are written on paper. • Linear format causes fractions and other expressions to be displayed in a single line. • See "Adjusting Display Contrast" for displayed calculation results. Calculation results are rounded off to use "]CONT'". Math Math Format Linear Format Specifying the Default Angle Unit To specify this key operation: 1N6(Fix)0-9 1N7(Sci)0-9 1N8...
User Guide - Page 11

...calculation results . To specify this: Show FREQ Column Hide FREQ Column Perform this key operation: 1Nc4(STAT)1(ON) 1Nc4(STAT)2(OFF) Specifying the Decimal Point Display Format To specify this decimal point display... the range in which results will be displayed in nonexponential format. E-9 only. Outside the specified range, results are displayed using exponential format. Norm1: 10-2 > ...
User Guide - Page 12

... Rnd( E-10 Inputting Expressions and Values k Inputting a Calculation Expression Using Standard Format Your calculator lets you input any of the functions shown below . 19(CLR)1(Setup)=(Yes) This setting: Calculation Mode Input/Output Format Angle Unit Display Digits Fraction Display Format Complex Number Format Statistical Display Decimal Point Is initialized to input the argument...
User Guide - Page 13

... Closed Parenthesis". Basically, each item you input uses up to the left and view the hidden part by pressing the d key. For more than one byte. Omitting the Multiplication Sign You can omit the multiplication sign (×) in any of a calculation, immediately before the = key is displayed, you are inputting functions with parenthesis...
User Guide - Page 14

..." for Linear format input is insert.You can only use depends on whether you have insert or overwrite selected as... shape to I ) or horizontal ( ) flashing line on the display screen. If the I ) when the insert mode is selected does...correct the expression 369 × 13 so it . With the overwrite mode, any new character you input replaces the character at a convenient point and calculate...
User Guide - Page 16

... you can then make necessary corrections. d1 = You can cause the height of 14 ÷ 10 × 2 = Use the insert mode for the following operation. Important! • Certain types of expressions can also exit the error screen by mistake instead of a calculation formula to be greater than one display line. If this happens, divide...
User Guide - Page 17

...(Abs) ( or ) Bytes 9 13 6 4 4 4 9 4 5 4 9 8 6 8 4 1 Math Format Input Examples • The following operations are used up by input. Function/Symbol Improper Fraction Mixed Fraction log(a,b) (Logarithm) 10^x (Power of 10) e^x (Power of the cursor on the display when you input using Math format. Example 1: To input 23 + 1 MATH 263 Math Math e+1 Example 2: To input...
User Guide - Page 19

...; Pressing 1= after inputting a calculation displays the result using decimal values. For details, see "Using S-D Transformation". Original Expression: Function Key Operation Integral 7 Resulting Expression Derivative 17(F) Σ Calculation 1&(8) You can also incorporate values into the following functions. 1l($), 1i(%), !, 6, 1!(#), 1w(Abs) Displaying Calculation Results in a Form that...
User Guide - Page 20

... the real part and the imaginary part. Complex number Abs calculations d. k ' Form Calculation Range Note When performing complex number calculations in decimal form for input values outside of the above ranges. a. CMPLX Mode polar coordinate display (r ∠ θ ) The following conditions apply respectively to two terms (an integer term is always used for display of trigonometric...
User Guide - Page 21

Reasons why the results of the examples are displayed in ' form even if coefficients (a′, c′, and d′) are ...;'e c′ • c′ is displayed in ' form are displayed in decimal form - Example: '3 +...calculation results are reduced to a common denominator, they are reduced to be used. More than two terms in the calculation result • Calculation results displayed...
User Guide - Page 22

... of Significant Digits You can specify a fixed number of Display Digits". Example: 7 × 8 - 4 × 5 = 36 LINE 7*8-4*5= • The calculator automatically judges the calculation priority sequence. E-20 • If a term is encountered during the calculation cannot be displayed as a root (') form or a fraction, the calculation result is displayed in the COMP Mode (N1). Example: 1 ÷...
User Guide - Page 23

... on the input/output format that involves both fraction and decimal values is displayed in the case of a calculation. Appendix -2 + -1 = -7 326 3 -1 + 1 -2 = 4 - 11 (Fraction Display Format: ab/c) 4 3 12 4 - 3 -1 = -1 (Fraction Display Format: ab/c) 22 • If the total number of digits used for a mixed fraction (including integer, numerator, denominator, and separator symbols) is greater...
User Guide - Page 39

... are treated as an angle value, in the range of -180° < θ < 180°. • Calculation result θ is displayed using the calculator's default angle unit. • Calculation result r is assigned to variable X, while θ is assigned to Y. k Σ Calculations With Σ(, you can be performed in the range of -1 × 1010 < a < b < 1 × 1010. •...
User Guide - Page 71

...8226; When using independent memory or a variable as the argument of the error. Stack ERROR • Cause • The calculation you are ...corrections. Note that the memory or variable value is a problem with the cursor located at the position of a function, make sure that in this case, the original calculation will display an error message when a result exceeds the calculation...
User Guide - Page 73

... errors. (2) Make sure that you will cause the calculator to read the display. Normally, calculators equipped with G13 type button battery (LR44). If one step does not correct the problem, move on to appear on the display immediately when you turn on the calculator indicates that you are using the correct mode for the type of important data before...

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