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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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1999
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Q)
If
y
=
s
i
n
(
7
sin
−
1
x
)
, then
(
1
−
x
2
)
y
2
−
x
y
1
is equal to :
( A )
49
y
( B )
−
49
y
( C )
−
7
y
( D )
7
y
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