.17quad ln" any "Delta ABC,((b-c)/(a))cos^(2)((A)/(2))+((c-a)/(b))cos^(2)((B)/(2))+((a-b)/(2))cos^(2)((C)/(2))=

In any Delta ABC, 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, ((b-c)/(a))cos^(2)((A)/(2))+((c-a)/(b))cos ^(2)((b )/(2))+((a-b)/(2 ))cos ^(2)((C)/(2)) is equal

In any Delta ABC, ((b-c)/(a))cos^(2)((A)/(2))+((c-a)/(b))cos ^(2)((b )/(2))+((a-b)/(2 ))cos ^(2)((C)/(2)) is equal to?

In any Delta ABC, ((b-c)/(a))cos^(2)((A)/(2))+((c-a)/(b))cos ^(2)((b )/(2))+((a-b)/(2 ))cos ^(2)((C)/(2)) is equal

in any triangle ABC prove that (b-c)/acos^2(A/2)+(c-a)/(b)cos^2(B/2)+(a-b)(/c)cos^2(C/2)=0

In Delta ABC,b(cos^(2)C)/(2)+c(cos^(2)B)/(2)=

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

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

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