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Mathematics
Mathematics
Problem
Given
a
=
⟨
3
,
−
2
,
1
⟩
\mathbf{a}=\langle 3,-2,1\rangle
a
=
⟨
3
,
−
2
,
1
⟩
and
b
=
⟨
1
,
4
,
−
2
⟩
\mathbf{b}=\langle 1,4,-2\rangle
b
=
⟨
1
,
4
,
−
2
⟩
, the angle between
a
\mathbf{a}
a
and
b
\mathbf{b}
b
is a) acute (less than
90
∘
90^{\circ}
9
0
∘
) b) obtuse (greater than
90
∘
90^{\circ}
9
0
∘
but less than
180
∘
180^{\circ}
18
0
∘
) c) right angle (
90
∘
90^{\circ}
9
0
∘
) d) cannot be determined from the given data
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