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CBSE Class 12 Math 2019 Delhi Set 1 Solved Paper

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Question : 10
Total: 29
If the sum of two unit vectors is a unit vector, prove that the magnitude of their difference is √3.
OR
If
→
a
=2
^
i
+3
^
j
+
^
k
,
→
b
=
^
i
−2
^
j
+
^
k
 and
→
c
=−3
^
i
+
^
j
+2
^
k
, find [
→
a
→
b
→
c
]
Solution:  
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