A B 2 tantan 2 In any triangle ABC, is equal to tan +tan 2 2

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

In any triangle ABC, if tan (A/2), tan (B/2), tan (C/2) are in A.P., prove that, cosA, cosB, cosC are also in A.P.

In any triangle ABC, if A=tan^(-1) 2 and B = tan^(-1) 3 . Prove that C= pi/4 .

In any triangle ABC, if A=tan^(-1) 2 and B = tan^(-1) 3 . Prove that C= pi/4 .

In any triangle ABC,1-tan((A)/(2))tan((B)/(2))=

In Delta ABC, tan 2A+ tan 2B+ tan 2C=

In any triangle ABC, if a,b,c are in A.P. then tan ""A/2, tan ""B/2, tan ""C/2 are in -

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-

In any triangle ABC, prove that : (b^2-c^2) tan B tan C + (c^2-a^2)tan C tan A+ (a^2-b^2)tan A tan B =0 .