In any `DeltaABC`, prove that : `(b+c) cos A + (c+a) cos B + (a+b) cos C = a+b+c`

In any o+ABC, prove that: (b+c)cos A+(c+a)cos B+(a+b)cos C=a+b+c

In any Delta ABC, prove that :a(b cos C-c cos B)=b^(2)-c^(2)

In triangle ABC , prove that (b+c)cos A +(c+a)cos B +(a+b)cos C=a+b+c .

In any Delta ABC, prove that: (sin B)/(sin C)=(c-a cos B)/(b-a cos C)

In any DeltaABC , prove that (c-bcosA)/(b-c cos A)=(cos B)/(cosC)

In any Delta ABC, prove that :a cos A+b cos B+c cos C=2a sin B sin C

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

In Delta ABC, prove that :(c-b cos A)/(b-c cos A)=(cos B)/(cos C)

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

In any DelataABC prove that "a(cos C - cos B)=2(b-c)cos"^(2)A/2