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[" 7.With the usual notation,in "Delta A...

[" 7.With the usual notation,in "Delta ABC" ,if "/_A+/_B],[=120^(@),a=sqrt(3)+1" and "b=sqrt(3)-1" ,then the ratio "/_A:/_B" ,is "],[[" (a) "3:1," (b) "5:3," (c) "7:1," (d) "9:7]]

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