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In a triangle ABC, ( b+c+-a) tan A\2 is equal to a) 2triangle\s. B) triangle \s C) triangle s\bc. D) s/aR
Hiii I a triangle ABC (b+c-a) tan A/2First write Tan (A/2) , Tan (B/2) , Tan (C/2) formula in terms of sThen apply heroins formulae, at last put the value of S = (a+b+c)/2You will get (b+c-a)Tan (A/2) = (a+c-b) Tan(B/2) = (a+c-b) Tan(C/2)
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