`(b^2-c^2)/acosA+(c^2-a^2)/bcosB+(a^2-b^2)/c cos C=0`

In any Delta ABC, prove that :(b^(2)-c^(2))cos2A+(c^(2)-a^(2))cos2B+(a^(2)-b^(2))cos2C=0

In triangle ABC , a (b^2 +c^2 ) cos A + b (c^2 +a^2 ) cos B + c(a^2 +b^2 ) cos C is equal to

In Delta ABC, prove that (b^(2)-c^(2))/(a)cos A + (c^(2)-a^(2))/(b)cos B + (a^(2) - b^(2))/(c) cos C = 0

(vii) (b^(2) -c^(2)) cos 2A + (c^(2) -a^(2)) cos 2B + (a^(2) -b^(2)) cos 2C=0

In triangle ABC,a(b^(2)+c^(2))cos A+b(c^(2)+a^(2))cos B+c(a^(2)+b^(2))cos C=

If any triangleABC , the value of a(b^(2)+c^(2))cos A+b(c^(2)+a^(2))cos B+c(a^(2)+b^(2))cos C=

In any triangle ABC, prove that : (a^2-b^2)/(cos A+cos B)+(b^2-c^2)/(cos B+cos C)+(c^2-a^2) /(cos C+cos A)=0 .

In DeltaABC , prove that: (b-c)/acos^(2)A/2+(c-a)/(b)cos^(2)B/2+(a-b)/(c ).cos^(2)C/2=0

In any DeltaABC , prove that : (b-c)/a cos^2 (A/2) + (c-a)/b cos^2 (B/2) + (a-b)/c cos^2 (C/2) = 0

In /_ABC prove that (b^(2)-c^(2))/(cos B+cos C)+(c^(2)-a^(2))/(cos C+cos A)+(a^(2)-b^(2))/(cos A+cos B)=0