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CBSE Class 12 Math 2019 All India Set 1 Solved Paper

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Question : 10
Total: 29
Find a unit vector perpendicular to both the vectors
→
a
 and
→
b
, where
→
a
=
^
i
−7
^
j
+7
^
k
 and
→
b
=3
^
i
−2
^
j
+2
^
k
.
OR
Show that the vectors
^
i
−2
^
j
+3
^
k
,−2
^
i
+3
^
j
−4
^
k
 and
^
i
−3
^
j
+5
^
k
 are coplanar.
Solution:  
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