Casio fx-991ES PLUS - Manual (Page 36)

E-35
3 × VctA (Vector scalar multiplication), 3 × VctA – VctB (Calculation
example using VctAns)
3 VctA
VctB
VctA • VctB (Vector dot product)
VctA(VECTOR)(Dot)VctB
VctA s
VctA VctB
Obtain the absolute values of VctC.
@(Abs)VctC
Determine the angle formed by VctA and VctB to three decimal
places (Fix 3). B
(cos θ =
(A
•
B)
A B
, which becomes θ = cos –1
(A
•
B)
A B
)
(SETUP)(Fix)
VctA(VECTOR)(Dot)VctB
@(Abs)VctA@(Abs)
VctB
2(cos –1 )
Scientific Constants
Your calculator comes with 40 built-in scientific constants that can be used in
any mode besides BASE-N. Each scientific constant is displayed as a unique
symbol (such as
P), which can be used inside of calculations.
To input a scientific constant into a calculation, press (CONST) and
then input the two-digit number that corresponds to the constant you want.
3 3
4 4
5 5
6 6
7 7
VCT FIX VCT FIX
VCT FIX VCT FIX