[" In any "Delta ABC" ,the value of "2ac...

[" In any "Delta ABC" ,the value of "2ac sin((A-B+C)/(2))" is "],[[" (a) "a^(2)+b^(2)-c^(2)," (b) "c^(2)+a^(2)-b^(2)," (c) "b^(2)-c^(2)-a^(2)]]

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