KCET 2007 Math Solved Paper

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Question : 4 of 60
 
Marks: +1, -0
If
→
a
and
→
b
are vectors such that |
→
a
+
→
b
|
=
|
→
a
−
→
b
|
, then the angle between
→
a
and
→
b
is
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