In DeltaABC,(a-b)^(2)cos^(2).(C)/(2)+(a+...

In `DeltaABC,(a-b)^(2)cos^(2).(C)/(2)+(a+b)^(2)sin^(2).(C)/(2)`=

A

`b^(2)`

B

`c^(2)`

C

`a^(2)`

D

`a^(2)+b^(2)+c^(2)`

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The correct Answer is:

B

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