Hello,
I need help with drawing tubular surface around curve. It is for my college project but we never used program like Sage so I don't know how to use it properly. We have Curve c(t)=(2cos(t),2sin(t),0.5*t) and I need to draw tubular surface around it. I need to calculate frenet trihedron and use it in some formula for tubular surface. Formula is on this link: imgur.com/CUCu0da. My question is how do I make 3d projection out of this formula?
