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CBSE Class 12 Math 2022 (Term II) Outside Delhi Set 2 Solved Paper

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SECTION - B
Question Nos. 7 to 10 carry 3 marks each.
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Question : 2
Total: 4
If
→
a
,
→
b
,
→
c
 are three vectors such that
→
a
⋅
→
b
=
→
a
⋅
→
c
 and
→
a
×
→
b
=
→
a
×
→
c
,
→
a
≠0, then show that
→
b
=
→
c
.
OR
If |
→
a
|=3,|
→
b
|=5,|
→
c
|=4 and
→
a
+
→
b
+
→
c
=
→
0
, then find the value of (
→
a
⋅
→
b
+
→
b
⋅
→
c
+
→
c
⋅
→
a
)
Solution:  
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