find the value of K if `(a+b+c) [ tan(A/2) + tan (B/2)]= k c*cot(c/2)`

Show that in any triangle ABC, (a+b+c) (tan (A/2) + tan (B/2)) = 2c cot (C/2)

tan((A+B)/(2))="cot"(C)/(2)

If the sides a,b,c of a triangle are in Arithmetic progressioni then find the value of tan (A/2)+tan(C/2) in terms of cot(B/2)

In any triangle ABC, the value of (b+c) tan ""A/2 tan ""(B-C)/(2)+ (c+a) tan ""B/2 tan ""(C-A)/(2) + (a+b) tan ""C/2 tan ""(A-B)/(2) is-

If the sides a, b, c of a triangle are in A.P., then find the value of tan frac (A)(2)+ tan frac (C)(2) in terms of cot frac (B)(2) .

In DeltaABC , prove that: (a+b+c).(tan(A/2)+tan(B/2))=2c cot(C/2)

Show that in any triangle ABC,(a+b+c)(tan((A)/(2))+tan((B)/(2)))=2c cot((C)/(2))

In DeltaABC show that (a+b+c)(tan.(A)/(2)+tan.(B)/(2))=2cot.(C)/(2)

If the sides a,b,c of a triangle are in Arithmetic progressioni then find the value of tan, A/2+tan, C/2 in terms of cot, B/2