SymPy Gamma

SymPy:

plot (r =1-sin (theta))

$\mathrm{Plot~}\left\{ r : 1 - \sin{\left(\theta \right)}\right\}$

Plot:

plot(r=1 - sin(theta))

See what Wolfram|Alpha has to say.

Want to compute something more complicated? Try a full Python/SymPy console at SymPy Live.