In a `Delta ABC,` the value of `(a cosA+b cosB+c cosC)/(a+b+c)` is equal to

(a+b+c)(cosA+cosB+cosC)

If the sides a, b, c of a triangle ABC are the roots of the equation x^(3)-13x^(2)+54x-72=0 , then the value of (cosA)/(a)+(cosB)/(b)+(cosC)/(c ) is equal to :

If the sides a, b, c of a triangle ABC are the roots of the equation x^(3)-13x^(2)+54x-72=0 , then the value of (cosA)/(a)+(cosB)/(b)+(cosC)/(c ) is equal to :

In Delta ABC prove that (b+c)/a = (cosB + cosC)/(1-cosA)

In a triangle ABC the expression acosBcosC+bcosC cosA+c cosA cosB equals to :

In a triangle ABC the expression acosBcosC+bcosC cosA+c cosA cosB equals to :

In a triangle ABC, the value of cosA/sinBsinC ​ + cosB/sinCsinA ​ + cosC/sinAsinB ​