Functions with two arguments can be visualized in three-dimensional plots. Getting this on paper or into a PDF, is a bit more challenging. We need a projection, a view point, or angle, there’s a depth which means parts should be hidden and others in the front.

We will use the pgfplots package to plot f(x,y) = sin(x)*sin(y).

The code, and more, is explained in the LaTeX Cookbook, Chapter 10, Advanced Mathematics, Plotting in three dimensions.

% Plotting in three dimensions % Author: Stefan Kottwitz % https://www.packtpub.com/hardware-and-creative/latex-cookbook \documentclass[border=10pt]{standalone} \usepackage{pgfplots} \begin{document} \begin{tikzpicture} \begin{axis} [ title = {$f(x,y) = \sin(x)\sin(y)$}, xtick = {0,90,...,360}, ytick = {90,180,...,360}, xlabel = $x$, ylabel = $y$, ticklabel style = {font = \scriptsize}, grid ] \addplot3 [surf, domain=0:360, samples=60] { sin(x)*sin(y) }; \end{axis} \end{tikzpicture} \end{document}

Open in Overleaf: 3d-plot.tex