Vector Algebra Part 1

Section: Mathematics
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Question : 25 of 100
 
Marks: +1, -0
Let a,b,c∈R be such that a2+b2+c2=1.
If a‌cos‌θ=b‌cos(θ+
2Ï€
3
)
=c‌cos(θ+
4Ï€
3
)
where θ=
Ï€
9
,
then the angle between the vectors a
^
i
+b
^
j
+c
^
k
and b
^
i
+c
^
j
+a
^
k
is :
[3 Sep 2020 Shift 2]
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