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CBSE XII
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Math
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Q)
If
→
a
,
→
b
and
→
c
are three unit vectors such that
→
a
.
→
b
=
→
a
.
→
c
=
0
and angle between
→
b
a
n
d
→
c
is
π
6
,
prove that
→
a
=
±
2
(
→
b
x
→
c
)
.
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