E-43
VctA
•
VctB (Vector dot product)
A
VctA
1
5
(VECTOR)
7
(Dot)
VctB
=
VctA
×
VctB (Vector cross product)
A
VctA
*
VctB
=
Obtain the absolute values of VctC.
A1w
(Abs)
VctC
)=
Determine the angle formed by VctA and VctB to three decimal
places (Fix 3).
v
(cos
=
(A
•
B)
A
B
, which becomes
=
cos
–1
(A
•
B)
A
B
)
1N
(SETUP)
6
(Fix)
3
A
(
VctA
1
5
(VECTOR)
7
(Dot)
VctB
)/
(
1w
(Abs)
VctA
)
1w
(Abs)
VctB
))=
1
c
(cos
–1
)
G
)=
Inequality Calculations (INEQ)
You can use the following procedure to solve a quadratic inequality or cubic
inequality.
1. Press
N
c
1
(INEQ) to enter the INEQ Mode.
2. On the menu that appears, select an inequality type.
To select this inequality type:
Press this key:
Quadratic inequality
1
(aX
2
+ bX + c )
Cubic inequality
2
(aX
3
+ bX
2
+ cX + d )
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.
• To solve
x
2
+ 2
x
– 3 < 0, for example, input the coefficients
a
= 1,
b
= 2,
c
= –3 by pressing 1
=
2
=
-
3
=
.
4
4
VCT
VCT
5
5
VCT
VCT
6
6
VCT
VCT
7
7
VCT
FIX
VCT
FIX
VCT
FIX
VCT
FIX