Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
If
A
B
C
ABC
A
B
C
is a triangle and
tan
A
2
,
tan
B
2
,
tan
C
2
\tan \frac{A}{2}, \tan \frac{B}{2}, \tan \frac{C}{2}
tan
2
A
,
tan
2
B
,
tan
2
C
are in H.P., then the minimum value of
cot
B
2
=
\cot \frac{B}{2} =
cot
2
B
=
(a)
3
\sqrt{3}
3
(b) 1 (c)
1
2
\frac{1}{\sqrt{2}}
2
1
(d)
1
3
\frac{1}{\sqrt{3}}
3
1
Browse the problem library