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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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1999
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Q)
The parametric equaions
x
=
2
a
(
1
−
t
2
)
1
+
t
2
, and
y
=
4
a
t
1
+
′
t
2
represents a circle of radius is equal to :
( A )
2
a
( B )
9
2
( C )
4
a
( D )
a
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