In `Delta ABC`, prove that `a^3 cos(B-C)+b^3 cos(C-A)+c^3 cos( A-B)=3abc`

In any triangle ABC, prove that: a^(3)cos(B-C)+b^(3)cos(C-A)+c^(3)cos(A-B)=3abc

Prove that in /_ABC,a^(3)cos(B-C)+b^(3)cos(C-A)+c^(3)cos(A-B)=3abc

In a Delta ABC prove that cos(A+B)+cos C=0

In a ABC, prove that sin^(3)A cos(B-C)+sin^(3)B cos(C-A)+sin^(3)C cos(A-B)=3s in As in Bs in

In any triangle ABC,prove that sin^(3)A cos(B-C)+sin^(3)B cos(C-A)+sin^(3)C cos(A-B)=3sin A sin B sin C

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

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

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)