` Delta ABC` , में ` ( b+c)/11 = (c+a)/12 = (a+b)/13` तो ` cos A : cos B : cos C` है -

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

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 :

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 :

In the triangle ABC, if (b+c)/11 = (c+a)/12 = (a+b)/13 , prove that (cos A)/7 = (cos B)/19 = (cos C)/25 .

In a triangle ABC , if (b+c)/(11)=(c+a)/(12)=(a+b)/(13) , then cos A=

In a DeltaABCV if (b+c)/(11)=(c+a)/(12)=(a+b)/(13) then cos C=