If the area of a triangle ABC is given by `Delta=a^(2)-(b-c)^(2)`, then `tan.(A)/(2)` is equal to

The area Delta of a triangle ABC is given by Delta=a^(2)-(b-c)^(2) then tan((A)/(2))=

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

If the area of the triangle ABC is a^(2)-(b-c)^(2), then its circumradius R=

If the area of the triangle ABC is a^(2)-(b-c)^(2) then its circumradius R is

In a triangle ABC with usual notation,if a+b=3c, then tan((A)/(2))tan((B)/(2)) is equal to

The sides of triangle ABC satisfy the relations a + b - c= 2 and 2ab -c^(2) =4 , then the square of the area of triangle is ______

In a triangle ABC, if /_A=55^(@) and /_B=15^(@), then c^(2)-a^(2) is equal to