Q. Find the domain plz! (xi) f (x) = log x cos 2 πx Share with your friends Share 0 Brijendra Pal answered this Hi, For domain of the expression,. This is because when, 0<2πx<π2 then 02π<x<π2×2π or 0<x<14and when 3π2<2πx<2π then 3π2×2π<x<2π2π or 34<x<1 0 View Full Answer