Question

Consider a particle moving on a circular path described by r(t)=bcos(wt)i + bsin(wt)j Find the velocity vector andshow that it is orthoganal to r(t)

Answer 1

This is standard work when learning circular motion (which I do not intend to copy up) - where are you learning it from?

Answer 2

Calc 3

Answer 3

Honestly, google this question and I can almost guarantee a full derivation will come pretty quick.