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Mathematics
Problem
Find the minimum value of
sec
−
1
(
x
)
+
cos
−
1
(
x
)
+
sin
−
1
(
x
)
+
csc
−
1
(
x
)
\sec^{-1}(x) + \cos^{-1}(x) + \sin^{-1}(x) + \csc^{-1}(x)
sec
−
1
(
x
)
+
cos
−
1
(
x
)
+
sin
−
1
(
x
)
+
csc
−
1
(
x
)
.
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