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Problem
Problem
In any triangle
A
B
C
ABC
A
B
C
, if
sin
A
,
sin
B
,
sin
C
\sin A, \sin B, \sin C
sin
A
,
sin
B
,
sin
C
are in AP, then the maximum value of
tan
B
2
\tan \frac{B}{2}
tan
2
B
is a.
−
1
3
-\frac{1}{\sqrt{3}}
−
3
1
b.
1
3
\frac{1}{\sqrt{3}}
3
1
c.
1
3
\frac{1}{3}
3
1
d. None of these
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