Inequality Calculations (Ineq) - Casio FX-115ES PLUS User Manual

VctA VctB (Vector dot product)
4 4
•
AVctA15(VECTOR)7(Dot)VctB=
VctA × VctB (Vector cross product)
5 5
Obtain the absolute values of VctC.
6 6
Determine the angle formed by VctA and VctB to three decimal
7 7
places (Fix 3). v
(cos =
1N(SETUP)6(Fix)3
A(VctA15(VECTOR)7(Dot)VctB)/
(1w(Abs)VctA)1w(Abs)

Inequality Calculations (INEQ)

You can use the following procedure to solve a quadratic inequality or cubic
inequality.
1. Press Nc1(INEQ) to enter the INEQ Mode.
2. On the menu that appears, select an inequality type.
To select this inequality type:
Quadratic inequality
Cubic inequality
3. On the menu that appears, use keys 1 through 4 to select the inequality
symbol type and orientation.
4. Use the Coefficient Editor that appears to input coefficient values.
x
2
• To solve
= –3 by pressing 1= 2 =- 3 =.
c
AVctA*VctB=
A1w(Abs)VctC)=
(A B)
•
, which becomes
A B
1c(cos
x
+ 2 – 3 < 0, for example, input the coefficients
–1
= cos
VctB))=
–1
)G)=
Press this key:
1(aX
2
2(aX
3
E-43
VCT VCT
VCT VCT
VCT VCT
(A B)
•
)
A B
VCT VCT
VCT VCT
+ bX + c )
2
+ bX + cX + d )
a
FIX FIX
FIX FIX
b
= 1, = 2,