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Problem
Problem
If the sides be
a
,
b
a, b
a
,
b
and
c
c
c
, then find the value of
(
r
+
r
1
)
tan
B
−
C
2
+
(
r
+
r
2
)
tan
C
−
A
2
+
(
r
+
r
3
)
tan
A
−
B
2
(r + r_1) \tan \frac{B - C}{2} + (r + r_2) \tan \frac{C - A}{2} + (r + r_3) \tan \frac{A - B}{2}
(
r
+
r
1
)
tan
2
B
−
C
+
(
r
+
r
2
)
tan
2
C
−
A
+
(
r
+
r
3
)
tan
2
A
−
B
.
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