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Mathematics
Problem
tan
−
1
2
+
tan
−
1
3
=
csc
−
1
x
\tan^{-1}2 + \tan^{-1}3 = \csc^{-1}x
tan
−
1
2
+
tan
−
1
3
=
csc
−
1
x
, then
x
x
x
is equal to: (a) 4 (b)
2
\sqrt{2}
2
(c)
−
2
-\sqrt{2}
−
2
(d) none of these
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