원과 접선(삼각함수 미분)
\begin{tikzpicture} [+preamble] \usepackage{pgfplots} \pgfplotsset{compat=newest} [/preamble] \begin{axis}[ ticks=none, xmin=0, xmax=1.5, ymin=0, ymax=1.5, axis equal, axis lines=middle, xlabel=$x$, ylabel=$y$, disabledatascaling]…