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Mathematics
Problem
sec
2
(
tan
−
1
2
)
+
csc
2
(
cot
−
1
3
)
=
\sec^2(\tan^{-1}2) + \csc^2(\cot^{-1}3) =
sec
2
(
tan
−
1
2
)
+
csc
2
(
cot
−
1
3
)
=
(a) 5 (b) 13 (c) 15 (d) 6
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