Angle Between Vectors Perpendicularity (Jee Mains) | ExamDuo
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Scalar and Vector Products
Medium
Angle Between Vectors Perpendicularity
If
λ
>
0
, let
θ
be the angle between the vectors
→
a
=
^
i
+
λ
^
j
−
3
^
k
and
→
b
=
3
^
i
−
^
j
+
2
^
k
. If the vectors
→
a
+
→
b
and
→
a
−
→
b
are mutually perpendicular, then the value of
(
14
cos
θ
)
2
is equal to
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SELECT ONE OPTION
A
25
B
20
C
50
D
40
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