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

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

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

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

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

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

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)

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