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Mathematics
Problem
The sine of the angle between the vector
a
=
3
i
^
+
j
^
+
k
^
\mathbf{a} = 3\hat{i} + \hat{j} + \hat{k}
a
=
3
i
^
+
j
^
+
k
^
and
b
=
2
i
^
−
2
j
^
+
k
^
\mathbf{b} = 2\hat{i} - 2\hat{j} + \hat{k}
b
=
2
i
^
−
2
j
^
+
k
^
is a.
74
99
\sqrt{\frac{74}{99}}
99
74
b.
25
99
\sqrt{\frac{25}{99}}
99
25
c.
37
99
\sqrt{\frac{37}{99}}
99
37
d.
5
41
\frac{5}{\sqrt{41}}
41
5
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