Consider a triangle ABC, where x, y, z are the length of perpendicular drawn from the vertices of the triangle to the opposite sides a, b, c respectively let the letters R, r, S, D denote the circumradius. inradius semi-perimeter and area of the triangle respectively. Ifcot A + cotB + cot C = k (1/x^(2) + 1/y^(2) + 1/z^(2)) ,then the value of k is

Consider a triangle ABC, where x, y, z are the length of perpendicular

1.	Consider a triangle ABC, where x, y, z are the length of perpendicular drawn from the vertices of the triangle to the opposite sides a, b, c respectively let the letters R, r, S, D denote the circumradius. inradius semi-perimeter and area of the triangle respectively. Ifcot A + cotB + cot C = k (1/x^(2) + 1/y^(2) + 1/z^(2)) ,then the value of k is
Answer» `R^(2)` `rR` `DELTA ` `a^(2) + B^(2) + c^(2) ` Answer :c