34 lines
655 B
TeX
34 lines
655 B
TeX
\begin{tikzpicture}[
|
|
my angle/.style={
|
|
draw, <->,
|
|
angle eccentricity=1.3,
|
|
angle radius=9mm
|
|
}
|
|
]
|
|
|
|
% coordinate axis
|
|
\draw[<->] (-2.5,0) -- (2.5,0);
|
|
\draw[<->] (0,-2.5) -- (0,2.5);
|
|
|
|
% circle
|
|
\draw (0,0) circle (2cm);
|
|
|
|
% coordinates
|
|
\coordinate (A) at ( 2,0);
|
|
\coordinate (B) at ( 0,2);
|
|
\coordinate (C) at (-2,0);
|
|
\coordinate (D) at (0,-2);
|
|
|
|
%
|
|
\coordinate (O) at ( 0:0);
|
|
|
|
\draw (C) node[anchor=north east] {-1};
|
|
|
|
% angles
|
|
\shorthandoff{"}
|
|
\pic[my angle, "$-\pi$"] {angle = C--O--A};
|
|
\pic[my angle, "$\pi$"] {angle = A--O--C};
|
|
\shorthandon{"}
|
|
|
|
% \coordinate[pin=300:{$(0,-1)$}] (sinTheta) at (C);
|
|
\end{tikzpicture} |