Currently I'm learning TiKZ and was following the "Karl drawing unit circle for his students" example. When I got to the point where we draw the sine line, the manual said we could use
\draw[red,very thick] (30:1cm |- 0,0)
I prefered this to
\draw[red,very thick] (30:1cm) -- +(0, -0.5)
as it relies on a specific value and is not very general. However, the latter works (draws a nice red sine line) but the former doesn't. How can I resovle this?
Thanks in advance?