\documentclass[a4paper]{article}

\usepackage{amsmath,amssymb}

%%%%%%%%%% XeTeX-specific %%%%%%%%%%%%
\usepackage[itemph]{xetexko-var}
%% ¿µ¹®±Û²Ã (Windows)
\setmainfont[Mapping=tex-text]{Times New Roman}
\setsansfont[Mapping=tex-text]{Arial}
\setmonofont[Scale=.9]{Courier New}
%% Çѱ۱۲à (Windows)
\setkormainfont(³ª´®¸íÁ¶ Bold)(*){³ª´®¸íÁ¶}
%% À§ÀÇ ¼±¾ðÀº ´ÙÀ½°ú °°°í, ¾Æ·¡ÀÇ \setkormainfont´Â \setmainhangulfont¿Í °°´Ù.
%% ÀÚ¼¼ÇÑ °ÍÀº ¸Å´º¾óÀ» ÂüÁ¶.
% \setkormainfont[BoldFont=³ª´®¸íÁ¶ Bold,ItalicFont=³ª´®¸íÁ¶,%
%                 ItalicFeatures={FakeSlant=.167}]{³ª´®¸íÁ¶}
\setkorsansfont(³ª´®°íµñ Bold)(*){³ª´®°íµñ}
\setkormonofont{¸¼Àº °íµñ}
\setmonoscale{.85}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\linespread{1.3}