Casio fx 991MS Support Question
Casio fx 991MS Support Question
Find answers below for this question about Casio fx 991MS - Scientific Display Calculator.Need a Casio fx 991MS manual? We have 1 online manual for this item!
Question posted by Vaddadhiumamadhuri on October 24th, 2021
Derivative
can we find derivative of sinx or logx directly without limits? Like d/dx of sinx = cosx
Current Answers
Answer #1: Posted by Troubleshooter101 on October 24th, 2021 4:22 PM
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Answer #2: Posted by SonuKumar on October 25th, 2021 8:57 AM
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Well, the derivative of a function is defined using a limit, so if you are finding derivatives, then you are indeed using limits directly or indirectly; however. in most calculus classes, the derivatives of trigonometric functions are remembered as formulas once derived. So, we have the formula
(sin x )=cos x
I hope that this was helpful.
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Related Casio fx 991MS Manual Pages
User Guide - Page 1
fx-95MS fx-100MS fx-115MS (fx-912MS) fx-570MS fx-991MS
User's Guide
kfx-912MS owners
Please be sure to read the important notice of this manual. E
http://world.casio.com/edu_e/
User Guide - Page 3
Never slide the display end of the unit into the cover.
.....1
.....2
1 Removing and Replacing the Calculator's Cover
• Before starting .....1 Holding the cover as shown in the illustration, slide the unit out of the cover. • After you are finished .....2 Holding ...
User Guide - Page 4
...the calculator. • Remove the battery if you do not plan to use the calculator for a long time (fx-95MS/100MS/570MS). • Use only the type of battery specified for this calculator in... following safety precautions before using this manual handy for later reference. Keep this calculator. Never expose batteries to direct heat or dispose of them to leak and damage nearby items, and can ...
User Guide - Page 5
.... Also avoid leaving the calculator in direct sunlight, near a window,...calculator is operating normally, replace the battery at least once every three years for the fx115MS/fx-570MS/fx-991MS, or at least once every two years for any claim of any kind whatsoever against the use of this manual are subject to internal circuitry.
3 Heat can cause slow display response, total failure of the display...
User Guide - Page 7
... Display Formats 10 kDecimal Point and Separator Symbols 11 k Initializing the Calculator 11
Basic Calculations 11
k Arithmetic Calculations 11 kFraction Operations 12 kPercentage Calculations 14 kDegrees, Minutes, Seconds Calculations 15 kFIX, SCI, RND 15
Memory Calculations 16
kAnswer Memory 16 kConsecutive Calculations 17 kIndependent Memory 17 k Variables 17
Scientific...
User Guide - Page 8
... and
Permutation/Combination 20 kAngle Unit Conversion 21
kCoordinate Conversion (Pol (x, y), Rec (r 21
kEngineering Notation Calculations 22
Equation Calculations 22
kQuadratic and Cubic Equations 22 kSimultaneous Equations 24
Statistical Calculations 26
Standard Deviation 26 Regression Calculations 28
Technical Information 32
kWhen you have a problem 32 kError Messages 32 kOrder of...
User Guide - Page 9
... same time.
• The upper line shows the calculation formula. • The lower line shows the result.
A separator symbol is displayed every three digits when the integer part of the mantissa has more than three digits. Before getting started... Two-line Display
The two-line display makes it possible to the "User's Guide 2 (Additional...
User Guide - Page 10
... step of each time you press a number key or arithmetic operator key A A or p key operation does not take up a step, so inputting A D, for calculation input can input up each section. Calculation Mode: Angle Unit: Exponential Display Format: Fraction Display Format: Decimal Point Character:
COMP Deg Norm 1 ab/c Dot
• Mode indicators appear in a subsequent...
User Guide - Page 11
... [ again back steps sequentially (new-to-old) through past calculations.
• Pressing the e or r key while a replay memory calculation is 128 bytes for that calculation.
• Pressing t does not clear replay memory, so you can recall the last calculation even after an error occurs displays the calculation with the cursor positioned at the insert cursor position...
User Guide - Page 13
...calculation mode and setup, and clear replay memory and variables. Disp
1
• Display the selection screen. A B 3(All) =
Basic Calculations COMP
k Arithmetic Calculations Use the F key to enter the COMP Mode when you want to perform basic calculations...
k Initializing the Calculator
• Perform the following key operation when you reach the setup screen shown below.
fx-95MS:
1 r...
User Guide - Page 15
fx-95MS:
1
Other Models: 1 r
• Press the number key (1 or 2) that corresponds to
the setting you want to specify the display format when a fraction calculation result is greater than one.
• To change the fraction display format, press the q key a number of times until you reach the setup screen shown below.
• Example 1: 2.75 ҃...
User Guide - Page 20
....2 A j 1 \ 23 = p 1 \ 28 =
Scientific Function Calculations
COMP
Use the F key to enter the COMP Mode when you want to use. (90° = π radians = 100 grads) 2 18 COMP F 1
• Certain types of calculations may take a long time to complete.
• Wait for the result to appear on the display before starting the next calculation.
• π...
User Guide - Page 22
... ) ҃ 1.988647795
7 A H 123 =
• Example 4: 123 ѿ 302 ҃ 1023
123 + 30 K =
• Example 5: 123 ҃ 1728
12 N * =
* A N in a group of fx-570MS/fx-991MS.
• Example 6: 1 ҃ 12
1 3
ȕ
1 4
R 3 a , 4 a T a =
• Example 7: 8! ҃ 40320
8 A f =
• Example 8: To generate a random number between
0.000 and 0.999
A M =
0.66400
(The...
User Guide - Page 23
.../fx-570MS/
fx-991MS.
θ ҃ 1.047197551
0 o
• Press 0 n to display the value of .
21
D R G
1 2 3
• Pressing 1, 2, or 3 converts the displayed value to the corresponding angle unit.
• Example: To convert 4.25 radians to degrees
q ..... 1(Deg)
4.25 A v 2(R) =
4 . 25r
243.5070629
k Coordinate Conversion (Pol (x, y), Rec (r, θ ))
• Calculation...
User Guide - Page 24
...; 81.25 ҂10 -3 (mg)
0.08125 = J
Equation
EQN
Calculations
The EQN Mode lets you want to solve an equation.
Use the F ...fx-95MS) F F F 1 (Other Models)
k Quadratic and Cubic Equations
Quadratic Equation: ax2 + bx + c = 0 Cubic Equation: ax3 + bx2 + cx + d = 0 Entering the EQN Mode and pressing r displays the initial quadratic/cubic equation screen.
Arrow indicates
direction...
User Guide - Page 28
... below. SD F 2 (fx-95MS) F F 1 (Other Models)
• Always start data input with A B 1(Scl) = to perform statistical calculations using standard deviation. S
&#...8226; Input data is used to register your input, the number of value:
Σx2 Σx n o σn σn-1
Perform this type of data input up to that point is indicated on the display...
User Guide - Page 30
... REG Mode, you just input. REG F 3 (fx-95MS) F F 2 (Other Models)
• Entering the REG Mode displays screens like the ones shown below. Press 1 if you just input, without registering the value you will be able to display or edit any of regression you want to perform statistical calculations using regression.
Press 2 to use.
1 (Lin...
User Guide - Page 37
... treated as a Type B function, so particular care is required when the calculation includes a high-priority Type A function, or power or root operations. * fx-100MS/fx-115MS/fx-570MS/fx-991MS only. ** fx-570MS/fx-991MS only. • Operations of the same precedence are performed first. • When a calculation contains an argument that the capacity of a stack is exceeded. • Matrix...
User Guide - Page 40
... correctly. 5 Replace the back cover and
secure it in place with the six screws. 6 Press 5 to turn power on the display of the calculator indicate that are performed in improper operation. Screw
38
Power Supply (fx-95MS only)
Users of other models should refer to become large. (This is also true of the...
User Guide - Page 41
... name) apply to turn power back on.
Owners of the fx-912MS should refer to the description of fx-115MS.
39 u Auto Power Off
Calculator power automatically turns off .
Power Supply: Single AA-size battery (R6P (SUM-3))
Battery Life:
Approximately 17,000 hours continuous display of other models should refer to the "User's Guide...
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