" 02.In a triangle "ABC," show that "(1)/(r_(1)^(2))+(1)/(r_(2)^(2))+(1)/(r_(3)^(2))+(1)/(r^(2))=(a^(2)+b^(2)+c^(2))/(Delta^(2))

Show that (1)/(r^(2))+(1)/(r_(1)^(2))+(1)/(r_(2)^(2))+(1)/(r_(3)^(2))=(a^(2)+b^(2)+c^(2))/(Delta^(2))

In a triangle ABC,if (1)/(r_(1)^(2))+(1)/(r_(2)^(2))+(1)/(r_(3)^(2))+(1)/(r^(2))=

In Delta ABC , (1)/(r^(2)) + (1)/( r_1^(2)) +(1)/( r_2^(2)) + (1)/(r_3^(2)) =

In a triangleABC , if 1/r^(2) + 1/r_(1)^(2) + 1/r_(2)^(2) + 1/r_(3)^(2) = (a^(2) + b^(2) + c^(2))/(Delta^(n)) , then n is equal to ………..

In a triangleABC , if 1/r^(2) + 1/r_(1)^(2) + 1/r_(2)^(2) + 1/r_(3)^(2) = (a^(2) + b^(2) + c^(2))/(Delta^(n)) , then n is equal to ………..

In Delta ABC , show that: (r_(1)+r_(2)) sec^(2) ""(C)/(2) = (r_(2) +r_(3)) sec^(2) ""(A)/(2) =(r_(3)+r_(1)) sec^(2)""(B)/(2)

In a triangle ABC,(r_(1)-r)/(a)+(r_(2)-r)/(b)+(r_(3)-r)/(c)=

In any triangle ABC, r_(1),r_(2)+r_(2)r_(3)+r_(3)r_(1)=....