You should make shiny graphs of how various arguments of a sin (bx + c) + d affect things. It's really helpful. Also, if you set X to sin(t) and Y to cos(t), you get a circle (ellipse).
Hardmath123 (talk | contribs) 22:37, 21 September 2014 (UTC)
I just found this: http://wiki.scratch.mit.edu/wiki/Sine