Tikz 庫：是什麼阻止了此程式碼的工作？無法呼叫 sin() 函數

Question

我嘗試在 (x,y) 座標的 x 座標部分呼叫數學函數，但無濟於事。奇怪的是它適用於 y 座標。語法肯定有問題，但我無法弄清楚。

這段程式碼示範了這個問題：

\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\draw (0,0) to [out=30,in=-120] (.5,{cos(60)}); % WORKS
\draw (0,0) to [out=30,in=-120] ({.5},{cos(60)}); % WORKS
\draw (0,0) to [out=30,in=-120] ({sin(30)},.5); % ATTEMPT 1: DOES NOT WORK
\draw (0,0) to [out=30,in=-120] (sin(30),.5); % ATTEMPT 2: DOES NOT WORK
\draw (0,0) to [out=30,in=-120] ({sin(30)},{.5}); % ATTEMPT 3: DOES NOT WORK
\draw (0,0) to [out=30,in=-120] ({sin(30),.5}); % ATTEMPT 4: DOES NOT WORK
\draw (0,0) to [out=30,in=-120] {(sin(30),.5)}; % ATTEMPT 5: DOES NOT WORK
\draw (0,0) to [out=30,in=-120] ({{sin(30)},.5}); % ATTEMPT 6: DOES NOT WORK
\draw (0,0) to [out=30,in=-120] {({sin(30)},.5)}; % ATTEMPT 7: DOES NOT WORK
\end{tikzpicture}
\end{document}

非常感謝您的幫忙。此致，