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Mathematics
Mathematics
Problem
Show that the vectors
2
i
^
−
j
^
+
k
^
2\hat{i} - \hat{j} + \hat{k}
2
i
^
−
j
^
+
k
^
and
i
^
−
3
j
^
−
5
k
^
\hat{i} - 3\hat{j} - 5\hat{k}
i
^
−
3
j
^
−
5
k
^
are at right angles.
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