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Problem
Problem
The angle between the two vectors
A
=
3
i
^
+
4
j
^
+
5
k
^
\mathbf{A} = 3\hat{i} + 4\hat{j} + 5\hat{k}
A
=
3
i
^
+
4
j
^
+
5
k
^
and
B
=
3
i
^
+
4
j
^
−
5
k
^
\mathbf{B} = 3\hat{i} + 4\hat{j} - 5\hat{k}
B
=
3
i
^
+
4
j
^
−
5
k
^
is a.
60
∘
60^\circ
6
0
∘
b.
45
∘
45^\circ
4
5
∘
c.
90
∘
90^\circ
9
0
∘
d.
30
∘
30^\circ
3
0
∘
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