In any ` A B C ,` prove that: `a(b\ cos C-ccosB)=b^2-c^2`

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

Prove that a(bcosC-ccosB)=b^2-c^2

For any triangle ABC, prove that a(bcosC-ccosB)=b^2-c^2

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

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

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

In any DeltaABC , 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)

For any triangle ABC, prove that a(cosC-cos B)\ =\ 2\ (b - c)\ cos^2(A/2)

In any triangle ABC ,prove that (a-b cos C)/( c-b cos A ) = (sin C ) /( sin A)

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