Prove that `bc cos^(2).(A)/(2) + ca cos^(2).(B)/(2) + ab cos^(2).(C)/(2) = s^(2)`

In a triangle ABC,bc cos^(2)(A)/(2)+ca cos^(2)(B)/(2)+ab cos^(2)(C)/(2)=

In any DeltaABC , prove that 4(bc cos^(2)""A/2+ca cos^(2)""B/2+ab cos^(2)""C/2)=(a+b+c)^(2)

Prove that a cos^(2)(A/2)+b cos^(2)(B/2)+c cos^(2)(C/2)=s+(Delta)/(R)

In a ABC, prove the following : 4(bos^(2)(A)/(2)+ca(cos^(2)B)/(2)+ab(cos^(2)C)/(2))=(a+b+c)^(2)

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

In any Delta ABC, prove that: (cos^(2)((A)/(2)))/(a)+(cos^(2)((B)/(2)))/(b)+(cos^(2)((c)/(2)))/(c)=(s^(3))/(abc)

4 (bc * cos ^ (2) ((A) / (2)) + cos ^ (2) ((B) / (2)) + ab * cos ^ (2) ((C) / (2)) ) = (a + b + c) ^ (2)

(bc) / (a) cos ^ (2) ((A) / (2)) + (ca) / (b) cos ^ (2) ((B) / (2)) + (ab) / (c ) cos ^ (2) ((C) / (2)) =

(bc) / (a) cos ^ (2) ((A) / (2)) + (ca) / (b) cos ^ (2) ((B) / (2)) + (ab) / (c ) cos ^ (2) ((C) / (2)) =