function x(t) { with(Math) {
return cos(t)
}}
function y(t) { with(Math) {
return sin(t)
}}
function z(t) { with(Math) {
return t
}}

44.4288293805

If I change x(t), y(t), z(t) I can If consider any curve.

Graphs like the one shown here can be plotted with R (see).