# Tikz: Missing number, treated as zero

After reading many related questions here about "Missing number, treated as zero", I still do not understand why the following example results in such an error message:

\documentclass[11pt]{article}

\usepackage{tikz}
\begin{document}

\begin{figure}
\begin{tikzpicture}

\clip(2.5,-1.5) rectangle (6,2);
\draw(4+{sin(0)}, {cos(0)}) circle(4pt);

\end{tikzpicture}
\end{figure}

\end{document}


Change 4+{sin(0)} to {4+sin(0)}. The mathematics routines only apply to stuff inside curly brackets.
• Your solution is correct, but the rationale is wrong: try, for example, \draw (4+0,0) circle (4pt);: math expressions work fine without curly braces. The curly braces are required around the entire expression if and only if it contains parentheses. – Paul Gessler Feb 23 '15 at 18:29