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Mathematics
Problem
For the implicit curve defined by
x
y
+
sec
2
y
=
4
xy+\sec^{2}y=4
x
y
+
sec
2
y
=
4
, find
d
y
d
x
\dfrac{dy}{dx}
d
x
d
y
at the point
(
1
,
0
)
(1,0)
(
1
,
0
)
.
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