This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
R sintheta Surface Plot. Polar surface plot of sin selfmade Mathematica Inductiveload Ploar Surface Plot of sin Equation sinleft theta right rmax Pi TextStyle FontSize BoxStyle AbsoluteThickness MeshStyle AbsoluteThickness AxesLabel ImageSize DisplayFunction Identity gr GraphicsDgr substitution theta Costheta Sintheta