## 编译环境 操作系统 * [x]Windows 7/8/10 * [ ] macOS * [ ] Linux `若需勾选，请把[ ]改成[x]` Tex发行版 * [ x] TexLive `年份` * [ ] MikTeX `版本号` * [ ] CTeX `若需勾选，请把[ ]改成[x]` ## 我的问题 ``` \documentclass[border=10pt]{standalone} \usepackage{tikz,tikz-3dplot} \usetikzlibrary{calc,arrows.meta} \begin{document} \begin{tikzpicture}[domain=0:4] \draw[very thin,color=gray] (-0.1,-1.1) grid (3.9,3.9); \draw[->] (-0.2,0) -- (4.2,0) node[right] {$x$}; \draw[->] (0,-1.2) -- (0,4.2) node[above] {$f(x)$}; \draw[color=red] plot ({tan(\x r)},\x) node[right] {$f(x) =\arctan x$}; \draw[color=blue] plot (\x,{sin(\x r)}) node[right] {$f(x) = \sin x$}; \draw[color=orange] plot (\x,{0.05*exp(\x)}) node[right] {$f(x) = \frac{1}{20} \mathrm e^x$}; \end{tikzpicture} \end{document} ```