Casio FX-991ES Support Question
Casio FX-991ES Support Question
Find answers below for this question about Casio FX-991ES.Need a Casio FX-991ES manual? We have 2 online manuals for this item!
Question posted by krazimichael on November 24th, 2012
Inverse Cos,tan,sin Using Cos-1 ( )
i'm using this calculator for pre calculus but when i input shift cos or sin or tan i get a math error, what is the proper way of doing it?
Current Answers
Answer #1: Posted by vnd on October 31st, 2013 8:19 PM
vnd
Member since:
October 31st, 2013 Points: 0
Member since:
October 31st, 2013 Points: 0
Related Casio FX-991ES Manual Pages
User Guide - Page 4
....
• The following procedure when you want to initialize the calculator and return the calculation mode and setup to their initial default settings. In this User's Guide and the separate Appendix are subject to change without notice. • In no event shall CASIO Computer Co., Ltd. E-2 k Using the Separate Appendix
Whenever you see "Using Calculator Memory".
User Guide - Page 10
... rounded off to use "]CONT'".
Specifying the Input/Output Format
For this input/output format: Math Linear
Perform this key operation: 1N6(Fix)0-9 1N7(Sci)0-9 1N8(Norm)1(Norm1) or 2(Norm2)
Calculation Result Display Examples • Fix: The value you specify (from 0 to 9) controls the number of
decimal places for information about how to the specified...
User Guide - Page 12
... the open parenthesis ( ( ) character. sin(, cos(, tan(, sin-1(, cos-1(, tan-1(, sinh(, cosh(, tanh(, sinh-1(, cosh-1(, tanh-1(, log(, ln(, e^(, 10^(, '(, 3'(, Abs(, Pol(, Rec(, ∫(, d/dx(, Σ(, P(, Q(, R(, arg(, Conjg(, Not(, Neg(, det(, Trn(, Rnd(
E-10
Inputting Expressions and Values
k Inputting a Calculation Expression Using Standard Format
Your calculator lets you need to...
User Guide - Page 13
..., see "Inputting with Math Format". For details, see "Inputting with Math Format". Input expression: 1111 + 2222 + 3333 + 444
Math
Displayed portion:
Cursor
• When the ] indicator is displayed, you can use Math format. Basically, each item you input uses up one byte. Final Closed Parenthesis You can omit the multiplication sign (×) in any of a calculation, immediately before...
User Guide - Page 14
... the overwrite mode, any new character you input replaces the character at a convenient point and
calculate the result.
The procedure you should use the insert mode. See "Incorporating a Value into a Function" for Linear format input is selected does not switch to Math. Changing the Character or Function You Just Input
Example: To correct the expression 369...
User Guide - Page 15
... Insert Mode:
369**12
dd
Y Overwrite Mode:
369**12
ddd
Y
Correcting a Calculation Example: To correct cos(60) so it becomes sin(60) LINE Insert Mode:
c60)
dddY
s Overwrite Mode:
c60)
dddd
s Inserting Input into a Calculation Always use the insert mode for this operation. E-13 Use d or e to move the cursor to the location where you want to...
User Guide - Page 16
... operation.
E-14 Example: When you can also exit the error screen by mistake instead of a calculation formula to be greater than one display line. k Inputting with Math Format
When inputting with the cursor positioned at the error location. d1
=
You can input and display fractions and some functions using the same format as they appear in your textbook...
User Guide - Page 20
... s60=
(Angle Unit: Deg)
Math
Example 3: sin-1 (0.5) = 1 π 6
MATH 1s(sin-1)0.5=
(Angle Unit: Rad)
Math
• The following conditions apply respectively to two terms
(an integer term is always used for input values outside of values with square root symbol ('), x2, x3, x-1 b. Arithmetic calculations of the above ranges. Complex number Abs calculations
d. Angle Unit Setting Deg Rad...
User Guide - Page 26
... Press f to edit the expression you input and execute, and its result.
Modes that calculation history memory contents are using Linear format, you turn off the calculator, press the O key, change to make room for the previous calculation. Using Calculation History Memory and Replay
Calculation history memory maintains a record of each calculation expression you used for the new...
User Guide - Page 31
Appendix
Calculate an +1 = an + 2n (a1 = 1) as XY + C = 0.)
• SOLVE cannot be used to solve an equation. XB = C + D, B (Solves for B.) The following types of approximation to solve an equation that contains an integral, derivative, Σ( function, Pol( function, Rec( function, or
multi-statement.
Example: Y = X + 5, X = sin(M), X + 3 = B + C,
XY + C (Treated as the value of ...
User Guide - Page 34
... the values this section are in functions. Appendix sin 30 = 0.5, sin-10.5 = 30
k Hyperbolic and Inverse Hyperbolic Functions
Hyperbolic and inverse hyperbolic functions can be sure to wait until execution of the current operation is one specified as the trigonometric functions. Function Calculations
This section explains how to use .
The functions available to you depends on...
User Guide - Page 35
....
• For the logarithmic function "log(", you must input the base (base m) when using the & key for the calculation.
• "ln(" is degrees. For details, see
Appendix .
Note that the calculator's default angle unit is a natural logarithm function with base e. • You can specify base m using Math format. E-33 Example: To convert the following values to...
User Guide - Page 55
... is narrower from binary (16 bits) than it is for the other number systems (32 bits).
• A Math ERROR occurs when a calculation result is always decimal (DEC). The key markings used . k Number Base Setting and Value Input
Use the keys listed below to specify the number base. Key
Number Base
U
Decimal
c
Hexadecimal
b
Binary
q
Octal
Screen Indicator...
User Guide - Page 61
...(MATRIX).
Obtain the transposition of Matrix A (det(MatA)).
Obtain the inverse matrix of Calculations". MatA + MatB (Adding Two Matrices) MatA × MatB, MatB × MatA - E-59 For more information, see "Using Answer Memory to Perform a Series of Matrix A (MatA-1).
• Use the E key to input "-1". • You cannot edit the contents of a cell. • To...
User Guide - Page 62
... N7(TABLE).
(2) Input the function.
(3) After making sure the function is not 1, press 1 to specify cubing. Obtain the absolute value (Abs(MatB)) of each element of Matrix A.
• Use w to specify squaring...• If the initial value is the way you cannot use 6 for this input.
Indicates the initial default start value input screen. k Configuring a Number Table Generation Function...
User Guide - Page 66
...cos θ = (A•B) , which becomes θ = cos-1 (A•B)
AB
AB
*2 Size 1 vector perpendicular to both A and B = (A × B) A × B
Scientific Constants
Your calculator... use the vectors input in scientific calculations. When you want to VctB =
(3, 4). • The following are commonly used in...
User Guide - Page 67
...d/dx(, Σ(
P(, Q(, R( sin(, cos(, tan(, sin-1(, cos-1(, tan-1(, sinh(, cosh(, tanh(, sinh-1(, cosh-1(, tanh-1( log(, ln(, e^(, 10^(, '(, 3'( arg(, Abs(, Conjg( Not(, Neg( det(, Trn( Rnd( 2. • The values are performed from one unit to a calculation priority sequence. • Basically, calculations are based on the "NIST Special Publication
811 (1995)". * "cal" uses the NIST value at...
User Guide - Page 69
... of whether the input value is a real number or a complex number. sin-1x cos-1x
GRA Same as the matrix stack, described above. RAD Same as sinx, except when ȊxȊ= (2n-1)҂90. Errors are cumulative in combination with the general-purpose numeric stack.The matrix stack has three levels. Performing a calculation that the...
User Guide - Page 71
... editing screen you
were using before the error message appeared. Math ERROR
• Cause • The intermediate or final result of the matrix stack to be exceeded.
• Action • Simplify the calculation expression so it does not exceed the capacity of an Error". • Pressing A clears the calculation expression you input before the error message appeared, with the...
User Guide - Page 72
... trying to perform a calculation with the calculation. Dimension ERROR (MATRIX and VECTOR Modes only) • Cause
• The matrix or vector you input as the solution variable.
Can't Solve Error (SOLVE feature only) • Cause
• The calculator could not obtain a solution. • Action
• Check for errors in the equation that you input. • Input a value for the...
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