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Mathematics
Problem
tan
[
sec
−
1
1
+
x
2
]
=
\tan[\sec^{-1}\sqrt{1+x^2}] =
tan
[
sec
−
1
1
+
x
2
]
=
(a)
1
x
\frac{1}{x}
x
1
(b)
∣
x
∣
|x|
∣
x
∣
(c)
1
1
+
x
2
\frac{1}{\sqrt{1+x^2}}
1
+
x
2
1
(d)
x
1
+
x
2
\frac{x}{\sqrt{1+x^2}}
1
+
x
2
x
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