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NEET Exam Model Paper 13
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© examsiri.com
Question :
50 of 180
Marks:
+1
,
-0
The angle between
→
A
=
⋀
i
+
⋀
j
and
→
B
=
⋀
i
−
⋀
j
is
45
90°
–45°
180°
Validate
Solution:
→
A
.
→
B
=
(
⋀
i
+
⋀
j
)
.
(
⋀
i
−
⋀
j
)
=
1
−
1
=
0
so
→
A
perpendicular to
→
B
so angle between them is
90
°
© examsiri.com
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