0
0/18
19
Vektorrechnung im 3-dimensionalen
0/18/2
19.2
Skalarprodukt
0/18/2/0
a
⃗
⋅
b
⃗
=
|
a
⃗
|
⋅
|
b
⃗
|
⋅
cos
φ
.
Kommutativgesetz:
a
⃗
⋅
b
⃗
=
b
⃗
⋅
a
⃗
Distributivgesetz:
a
⃗
⋅
(
b
⃗
+
c
⃗
)
=
a
⃗
⋅
b
⃗
+
a
⃗
⋅
c
⃗
Orthogonalität:
a
⃗
⋅
b
⃗
=
0
a
⃗
⋅
b
⃗
=
a
x
a
y
a
z
⋅
b
x
b
y
b
z
=
a
x
⋅
b
x
+
a
y
⋅
b
y
+
a
z
⋅
b
z
.