I have a task given to me in my homework I can not figure out what asks of me. The task is worded like this:
A curve in a plane is given by
$$ x(t) = 3(t - \sin(t)) $$
$$ y(t) = 3(1 - \cos(t)) $$
Find the parametric normal-curve $x(s, t), y(s, t)$ through $(x(t), y(t))$, where $s$ is the normal's parameter.
I am not interested in a solution to this task, just an interpretation of what it means so that I will be able to solve it myself. Thanks in advance =)