Added polar coordinates sample

polar-coordinates-template.tex

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+%POLAR COORDINATES
+%The print template for A4 paper (portrait)
+%Author: Zoran Nikolic
+\documentclass[12pt]{article}
+\usepackage[margin=0.5in,paper=a4paper]{geometry} %Shrinking margins to 0.5in
+\usepackage[x11names]{xcolor}                     %Additional colors
+\usepackage{tikz}
+%%%<
+\usepackage{verbatim}
+\usepackage[active,tightpage]{preview}
+\PreviewEnvironment{tikzpicture}
+\setlength\PreviewBorder{5pt}%
+%%%>
+
+% Found at https://texample.net/tikz/examples/polar-coordinates-template/
+
+\begin{comment}
+:Title:  Polar coordinates template
+
+\end{comment}
+\usepackage{euler}                                %Nicer numbers
+
+%Note about the colors: 
+%  The color of the "ray" lines should not be
+%  black or gray as on some printers, significant
+%  aliasing distorsion becomes visible.
+
+\begin{document}
+\thispagestyle{empty} %Please, no page numbers or similar
+
+\begin{center}
+  \begin{tikzpicture}
+    %Circles 
+    \foreach \r in {1, 2,...,7}
+      \draw[SteelBlue3, thick] (0,0) circle (\r);    
+    \foreach \r in {0.5, 1.5,...,7}
+      \draw[Azure4, thin] (0,0) circle (\r);
+    %1° Rays
+    \foreach \a in {0, 1,...,359}
+      \draw[Azure4] (\a:7.7) -- (\a:8);
+    %5° Rays
+    \foreach \a in {0, 5,...,359}
+      \draw[Azure4] (\a:7.5) -- (\a:8);      
+    %15° Rays
+    \foreach \a in {0, 15,...,359}
+      \draw[thick,Azure4] (\a:1) -- (\a:8); 
+    %30° Rays
+    \foreach \a in {0, 30,...,359}
+      \draw[thick,Azure4] (0, 0) -- (\a:8);
+    %Radius labels (background filled white)
+    \foreach \r in {1, 2,...,7}
+      \draw (\r,0) node[inner sep=1pt,below=3pt,rectangle,fill=white] {$\r$};
+    %Main rays
+    \foreach \a in {0, 90,...,359}
+      \draw[very thick] (0, 0) -- (\a:8);
+    %Angle labels  
+    \foreach \a in {0, 15,...,359}
+      \draw (\a: 8.5) node {$\a^\circ$};
+    %Central point
+    \draw[fill=red] (0,0) circle(0.7mm);
+  \end{tikzpicture}
+\end{center}
+
+\end{document}