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CBSE Class 12 Math 2020 Delhi Set 1 Solved Paper

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Question : 30
Total: 36
If
→
a
=
^
i
+2
^
j
+3
^
k
 and
→
b
=2
^
i
+4
^
j
−5
^
k
 represent two adjacent sides of a parallelogram, find unit vectors parallel to the diagonals of the parallelogram.
OR
Using vectors, find the area of the triangle ABC with vertices A(1,2,3), B(2,−1,4) and C(4,5,−1).
Solution:     👈: Video Solution
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