How to write degree symbol in LaTex ? It exists two methodes one using circ command, another one using package siunitix.

Latex degree symbol not so beautiful \circ

In geometry and trigonometry, a right angle is an angle of exactly $90^\circ$

In geometry and trigonometry, a right angle is an angle of exactly $90^\circ$

Beautiful Latex degree symbol \ang

Personally, i prefer the siunitx package:

\documentclass[12pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage{siunitx}
\begin{document}
Choose/Choisissez:

$\alpha=\ang{30} \Rightarrow$ package siunitx

$\alpha=30^\circ \Rightarrow$ defaut/default
\end{document}