\documentclass[12pt]{jsarticle}
\usepackage{amsmath,amssymb}
\pagestyle{empty}
\begin{document}
\setlength{\baselineskip}{22pt}
\begin{flushleft}
{\huge 1}
　$0 \leqq x <2\pi$の範囲で次の方程式の解を求めよ．
\begin{description}
\item[(1)]$\sin^3x+\cos^3x=1$
\item[(2)]$\sin^3x+\cos^3x+\sin x=2$
\end{description}
\end{flushleft}
\end{document}
