Inequality Calculations - Casio fx-570EX User Manual

3. Use the Vector Editor that appears to input the elements of the vector.
To edit the elements of a vector variable
Press (Edit Vector), and then, on the menu that appears, select the
vector variable you want to edit.
To copy vector variable (or VctAns) contents
1. Use the Vector Editor to display the vector you want to copy.
• If you want to copy VctAns contents, perform the following to display
the VctAns screen: (VctAns).
2. Press , and then perform one of the following key operations to
specify the copy destination: (VctA), (VctB), (VctC), or
(VctD).
• This will display the Vector Editor with the contents of the copy
destination.
Vector Calculation Examples
The examples below use VctA = (1, 2) and VctB = (3, 4), and VctC = (2, -1,
2).
VctA • VctB (Vector dot product)
 VctA (Dot Product) VctB 
VctA × VctB (Vector cross product)
To obtain the absolute values of VctC
To determine the angle formed by VctA and VctB to three decimal places
(Fix 3). (Angle Unit: Degree)
(SETUP)(Number Format)(Fix)
(Angle) VctA (,)
To normalize VctB
(Unit Vector) VctB 

Inequality Calculations

You can use the procedure below to solve a 2nd, 3rd, or 4th degree
inequality.
1. Press , select the Inequality Mode icon, and then press .
2. On the dialog box that appears, use a number key ( to ) to
specify the degree of the inequality.
3. On the menu that appears, use keys  through  to select the
inequality symbol type and orientation.
4. Use the Coefficient Editor that appears to input coefficient values.
• To solve x
coefficients (a = 1, b = 2, c = -3): 123.
• Pressing  will clear all of the coefficients to zero.
5. After all the values are the way you want, press .
• This will display the solutions.
 VctA  VctB 
(Abs) VctC 
2
+ 2x − 3 < 0, for example, input the following for the
VctB 
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