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[" If "(tan3A)/(tan A)=a rArr(sin3A)/(si...

[" If "(tan3A)/(tan A)=a rArr(sin3A)/(sin A)=],[[" 1) "(2a)/(a-1)," 2) "(2a)/(a+1)," 3) "(a)/(a+1)," 4) "(a)/(a-1)]]

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