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

If A, B, C are the angles of a triangle such that "cot"(A)/(2)="3 tan"(C )/(2) , then sin A, sin B, sin C are in

Show that Delta =(a^(2))/( 2( cot B+ cot C ) )

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

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

If Delta =a^2-(b-c)^2 , is the area of the triangle ABC, then tan A=