Help with Mathematica 2

Hello everyone,

Is there anyway but which i can eliminate t from the following two equations.

x=k*t - r*Cos[w*t]
y=rSin[w*t]

Using in built functions.
I tried to use Eliminate[], But its not giving the desired answer because 2 or more values of t can satisfy this.

Is there any other way i cna eliminate t???

Please Help,

Thanking,
Kinjal.
.