In any `DeltaABC`, prove that : `a(b cos C - c cos B) = b^2 - c^2`.

In any DeltaABC , prove that a(bcosC-c cosB)=(b^(2)-c^(2))

For any triangle ABC,prove that a(b cos C-c cos B)=b^(2)-c^(2)

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

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

Prove that a(b cos C- os B)=b^(2)-c^(2)

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 DeltaABC , prove that: a(cosC-cosB)=2(b-c)cos^(2)A/2

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)/(a cos B+b cos A)=(a^(2)+b^(2)+c^(2))/(2abc)

In DeltaABC , prove that: (bcos^(2)C)/2+(c cos^(2)B)/2=s