[" 6.If "A,B,C," are the interior angles...

[" 6.If "A,B,C," are the interior angles of a triangle "ABC," prove that "],[[" (i) "tan((C+A)/(2))=cot(B)/(2)," (ii) "sin((B+C)/(2))=cos(A)/(2)," [NC "]]

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