If in a triangle `ABC,(s-a)/(11)=(s-b)/(12)=(s-c)/(13)` .and `k tan^(2)(A/2)=429,` then `(sqrt(k))/(11)`

If in a triangle ABC,(s-a)(s-b)=s(s-c), then angle C is equal to

In Delta ABC, a^(2)(s-a)+b^(2)(s-b)+c^(2)(s-c)=

If in a triangle ABC , (b+c)/11=(c+a)/12=(a+b)/13 then cosA is equal to

In triangleABC," if"(s-a)/(Delta)=1/8, (s-b)/(Delta)=1/12 and (s-c)/(Delta)=1/24 , then b=

With usual notations,if in a triangle ABC(b+c)/(11)=(c+a)/(12)=(a+b)/(13), then prove that: (cos A)/(7)=(cos B)/(19)=(cos C)/(25)

In a triangle ABC, if (a-b)/(b-c)= (s-a)/(s-c) , then r_1,r_2,r_3 are in

With usual notion,if in triangle ABC ,(b+c)/(11)=(c+a)/(12)=(a+b)/(13), then prove that (cos A)/(7)=(cos B)/(19)=(cos C)/(25)

With usual notation,if in a triangle ABC ,(s-a)/(5)=(s-b)/(6)=(s-c)/(7), then value of cos C is-

Delta ABC,(s-a)/(Delta)=(1)/(8),(s-b)/(Delta)=(1)/(12),(s-c)/(Delta)=(1)/(24) then b=

With usual notations, if in a triangle ABC (b+c)/(11) = (c+a)/(12) = (a+b)/(13) , then cos A : cos B : cos C is :