\documentclass{standalone}
\standaloneconfig{border={0pt 2pt 2pt 2pt}}
%Alternative:\usepackage[margin=3pt,paperwidth=11.6cm,paperheight=6.5cm]{geometry}
\usepackage[utf8]{inputenc}
\usepackage{pgfplots,tikz}
\pgfplotsset{width=12cm,compat=1.17} % or 1.18
\pagestyle{empty}
\begin{document}
%
% SOURCE: https://ctan.org/pkg/pgfplots
%
\begin{tikzpicture}
\begin{axis}[
]
% density of Normal distribution:
\addplot [
red,
domain=-5e-3:5e-3,
samples=200,
]
{exp(-x^2 / (2e-3^2)) / (1e-3 * sqrt(2*pi))};
\end{axis}
\end{tikzpicture}
% 3D plot
\begin{tikzpicture}
\begin{axis}
\addplot3 [
surf,
domain=0:360,
samples=50,
] {sin(x)*sin(y)};
\end{axis}
\end{tikzpicture}
\end{document}