If SecA-TanA=1/√3, find SecATanA
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sec^2 A = 1 + tan^2 A ,
sec^2 A - tan^2 A=1 ,
(sec A + tan A)(sec A -tan A)=1 ,
(sec A + tan A)=1/(sec A -tan A) ,
(sec A + tan A)=3.
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