If A , B and C are interior angles of a triangle ABC, then show that `tan ((A+B) /(2)) =cot (C/2) `

If A , B and C are interior angles of triangle ABC ,then show that sin ((B+C)/( 2) )=cos (A/2)

If A, B and C are interior angles of a triangle ABC, then show that sin((B+C)/2) =Cos (A/2) ​

A, B and C are interior angles of a triangle ABC, then sin ((B + C)/(2)) =

If A,B,C are the angles of a triangle, show that, (ii) tan ((A - B)/2) = cot (C/2 + B) .

If A, B, C are the angles of a triangle then tan ((B+C)/2)=

In triangle ABC prove that tan((A+B)/2)=cot. C/2

In any triangle ABC, show that, (a+b-c) (cot A/2 + cotB/2) = 2c cot C/2

If A,B,C are interior angles of a triangle ABC such that (cosA+cosB+cosC)^2+(sin A+sin B+sin C)^2=9 then the number of possible triangle is

If ina triangle ABC, b+c=3a, then cot(B/2)cot (C/2) is equal to

If A,B,C are the angles of a triangle, show that, (iv) (tan(B + C) + tan (C + A) + tan (A + B))/(tan (pi - A) + tan(2pi - B) + tan (3pi - C)) = 1