In `Delta ABC, "cot"(A)/(2) + "cot" (B)/(2) + "cot" (C)/(2)` is equal to

In Delta ABC , if cot "" (A)/(2) , cot "" ( B)/(2) , cot "" (C )/(2) are in A.P., then a,b,c are in

In Delta , if cot "" (A)/(2) : cot : (B )/(2) : cot ""( C )/(2) = 3 : 7: 9, then a:b:c =

In Delta ABC r_1 cot "" (A)/(2) + r_2 cot "" (B)/(2) + r_3 cot "" ( C )/(2) =

In Delta ABC, " if" s= 2b " then " cot "" (A)/(2) cot "" ( C)/(2) =

In any Delta ABC,cot((A)/(2)),cot((B)/(2)),cot((C)/(2)) are in A.P.

In ABC,(cot A)/(2)+(cot B)/(2)+(cot C)/(2) is equal to (Delta)/(r^(2))(b)((a+b+c)^(2))/(abc)2R(c)(Delta)/(r)(d)(Delta)/(Rr)

In a Delta ABC, if cot((A)/(2)):cot((B)/(2)):cot((C)/(2))=1:4:15 then the greatest angle is

In Delta ABC, (cot B + cot C)/(cot C + cot A) = ....