[" 9.If "A+B+C=pi" and "sin(A+(C)/(2))=K...

[" 9.If "A+B+C=pi" and "sin(A+(C)/(2))=K sin(C)/(2)" ,then "],[tan(A)/(2)*tan(B)/(2)" is equal to "],[[" (1) "(K-1)/(K+1)," (2) "(K+1)/(K-1)],[" (3) "(K)/(K+1)," (4) "(K+1)/(K)]]

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