In any Delta ABC, ((b-c)/(a))cos^(2)((A)...

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

A

`(b^(2)-c ^(2))/(a ^(2))`

B

`(c^(2)-a^(2))/(b ^(2))`

C

`(a^(2)-b ^(2))/(c ^(2))`

D

0

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