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[" 04.In triangle "ABC" ,prove that "cos...

[" 04.In triangle "ABC" ,prove that "cos(A)/(2)+cos(B)/(2)+cos(C)/(2)=4cos(pi-A)/(4)cos(pi-B)/(4)cos(pi-C)/(4)],[" Short Answer Questions "," Marks: "4times~ 4=16M]

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