以下是问题的简短版本（向下滚动一点）
我正在尝试在这里制作这个图形（底部的手绘部分应该是错误出现的图形）
曲线方程的形式如下（左上角的方程）：
因此我编写的代码如下：
\documentclass[english]{article}
\usepackage[T1]{fontenc}
\makeatletter
\usepackage{tikz}
\usepackage{pgfplots}
\makeatother
\usepackage{babel}
\begin{document}
\begin{tikzpicture}[scale=1]
\draw (0,0) rectangle (8,8);
\begin{scope}[scale=1]
\clip (0,0) rectangle (8,8);
\draw [domain=-10:-170,samples=200] plot ({3+1*cos(\x)}, {6+1*sin(\x)});
\draw [domain=0:-220,samples=200] plot ({3+2*cos(\x)}, {6+2*sin(\x)});
\draw [domain=0:-250,samples=200] plot ({3+3*cos(\x)}, {6+3*sin(\x)});
\draw [domain=0:-360,samples=200] plot ({3+4*cos(\x)}, {6+4*sin(\x)});
\draw [domain=0:-360,samples=200] plot ({3+5*cos(\x)}, {6+5*sin(\x)});
\draw [domain=0:-360,samples=200] plot ({3+6*cos(\x)}, {6+6*sin(\x)});
\draw [domain=0:-360,samples=200] plot ({3+7*cos(\x)}, {6+7*sin(\x)});
\draw [domain=-10:-170,samples=200] plot ({5+1*cos(\x)}, {6+1*sin(\x)});
\draw [domain=40:-180,samples=200] plot ({5+2*cos(\x)}, {6+2*sin(\x)});
\draw [domain=0:360,samples=200] plot ({5+3*cos(\x)}, {6+3*sin(\x)});
\draw [domain=0:-360,samples=200] plot ({5+4*cos(\x)}, {6+4*sin(\x)});
\draw [domain=0:-360,samples=200] plot ({5+5*cos(\x)}, {6+5*sin(\x)});
\draw [domain=0:-360,samples=200] plot ({5+6*cos(\x)}, {6+6*sin(\x)});
\draw [domain=0:-360,samples=200] plot ({5+7*cos(\x)}, {6+7*sin(\x)});
\draw [densely dashed,thick] (4,6.4) +(-61.7:0.65) -- +(-61.7:8);
\draw [densely dashed,thick] (4,6.4) +(-118.3:0.65) -- +(-118.3:8);
\draw [densely dashed,thick] (4,5.8) -- (4,0);
\end{scope}
\fill[white] (2,6) rectangle (6,8);
\draw (2,6) rectangle (6,8);
\draw (3,6.2) circle (0.1);
\draw (5,6.2) circle (0.1);
\begin{scope}[yshift=-6cm]
\begin{axis}[
hide axis,
trig format=rad,
,
]
\addplot [
black,
domain={-0.73}:{0.73},
samples=201,
]
{2*(3*pi*sin(sin(\x))^(2)*(3*pi*sin(\x))^(-2)};
\end{axis}
\end{scope}
\end{tikzpicture}
\end{document}
然而它在这里产生了这个图像：
我目前不知道为什么它看起来不像第二张图里的图形。
如果读起来太长，这就是问题所在，以下代码：
\documentclass[english]{article}
\usepackage[T1]{fontenc}
\makeatletter
\usepackage{pgfplots}
\usepackage{tikz}
\makeatother
\usepackage{babel}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
hide axis,
trig format=rad,
,
]
\addplot [
black,
domain={-0.73}:{0.73},
samples=500,
]
{2*(3*pi*sin(sin(\x))^(2)*(3*pi*sin(\x))^(-2)};
\end{axis}
\end{tikzpicture}
\end{document}
呈现此功能：
没有这个功能
答案1
我认为这是你应用方式的问题BODMAS:)
我希望下面正确的脚本能有所帮助。
\documentclass[english]{article}
\usepackage[T1]{fontenc}
\makeatletter
\usepackage{pgfplots}
\usepackage{tikz}
\makeatother
\usepackage{babel}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
hide axis,
trig format=rad,
,
]
\addplot [
black,
domain={-0.73}:{0.73},
samples=500,
]
{2*(sin(3*pi*sin(\x))^(2)*(3*pi*sin(\x))^(-2)};
\end{axis}
\end{tikzpicture}
\end{document}
给出：
