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

If ABC are angle of a triangle then prove that cot Acot B+ cot Bcot C+cotCcostA=1

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

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

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

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