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CBSE Class 12 Math 2020 Delhi Set 1 Solved Paper

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Question : 5
Total: 36
If
^
i
,
^
j
,
^
k
 are unit vectors along three mutually perpendicular directions, then
Solution:     👈: Video Solution
Given,
^
𝑖
,
^
𝑗
,
^
K
 are vectors and mutually perpendicular to each other
Here
^
𝑖
^
i
^
𝑗
=
^
𝑗
.
^
k
=
^
k
⋅
^
𝑖
=0
and
^
i
×
^
j
=
^
k

^
j
×
^
k
=
^
i

^
k
×
^
i
=
^
j

∴ Only option [C] î.
^
K
=0 is the correct answer
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