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In a triangle ABC , 2acsin.(1)/(2)(A-B+C...

In a triangle ABC , `2acsin.(1)/(2)(A-B+C)` is equal to :

A

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

B

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

C

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

D

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

Text Solution

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The correct Answer is:
B
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