" 5) "(b+c)/(pi)=(c+a)/(12)=(a+b)/(13)

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

In triangleABC , If (b+c)/(11)=(c+a)/(12)=(a+b)/(13) , then cosC=

If in DeltaABC , (b+c)/(11)=(c+a)/(12)=(a+b)/(13) , then cosA equals :

In triangleABC , If (b+c)/(11)=(c+a)/(12)=(a+b)/(13) , then cosC=

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

In a triangle ABC, if (b+c)/(11) =(c+a)/(12) =(a+b)/(13), then the value of cos C is-

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

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

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