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Question 1203c
Vectors I: Basics, Dot and Cross Products
Algebra III
Question
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Given that
∣
a
∣
=
2
,
{|\mathbf{a}|=2,}
∣
a
∣
=
2
,
b
{\mathbf{b}}
b
is a unit vector, and the angle between the the vectors is
6
0
∘
,
{60^\circ,}
6
0
∘
,
what is the value of
(
3
a
−
3
b
)
⋅
(
2
a
+
b
)
?
(3 \mathbf{a} - 3 \mathbf{b})\cdot(2 \mathbf{a} + \mathbf{b})?
(
3
a
−
3
b
)
⋅
(
2
a
+
b
)?
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Your answer:
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