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Scalar Product of Vectors
a
→
=
x
1
i
→
+
y
1
j
→
,
b
→
=
x
2
i
→
+
y
2
j
→
a
→
·
b
→
=
|
a
→
|
|
b
→
|
c
o
s
α
a
→
·
b
→
=
x
1
·
x
2
+
y
1
·
y
2
In case of 3D:
a
→
=
x
1
i
→
+
y
1
j
→
+
z
1
k
→
b
→
=
x
2
i
→
+
y
2
j
→
+
z
2
k
→
a
→
·
b
→
=
x
1
·
x
2
+
y
1
·
y
2
+
z
1
·
z
2
Keywords: multiplication of vector, scalar multiplication, scalar product of vectors
