\setlength\unitlength{1cm}

\begin{picture}(8,4)(0,-1.5) %두 좌표순서가 바뀌면 안됨

\VECTOR(0,-1.5)(0,2.5)

\put(0,0){\Vector(8,0)}

\put(-0.1,1){\makebox(0,0)[r]{$1$}}

\put(-0.1,0){\makebox(0,0)[r]{$0$}}

\put(-0.1,-1){\makebox(0,0)[r]{$-1$}}

 

\put(2.9,-0.3){$\pi$}

\put(5.8,-0.3){$2\pi$}

\put(7.8,-0.4){$\theta$}

\color{gray!50}

\put(0,1){\line(1,0){6.23}}

\put(0,-1){\line(1,0){6.23}}

\thicklines

\color{red}

\put(0.1,1.1){$\cos\theta$}

\Curve(0,1)<1,0>(1.57,0)<1,-1>(3.14,-1)<1,0>(6.28,1)<1,0>

\color{blue}

\put(1.65,1.1){$\sin\theta$}

\Curve(0,0)<1,1>(1.57,1)<1,0>(4.71,-1)<1,0>(6.28,0)<1,1>

\end{picture}

 

좌표값과 사인, 코사인 그래프는 베꼈습니다;;;

결국 중요한 부분은 다 베꼈네요;;;