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Mathematics
Mathematics
Problem
If
y
=
sec
−
1
(
1
+
x
2
)
y = \sec^{-1}(\sqrt{1+x^2})
y
=
sec
−
1
(
1
+
x
2
)
, when
−
1
<
x
<
1
-1 < x < 1
−
1
<
x
<
1
, then find
d
y
d
x
\frac{dy}{dx}
d
x
d
y
.
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