Question

Eliminate the parameter.

x = 3 cos t, y = 3 sin t

Answer 1

any idea how to do this yet?

Answer 2

Rearrange the terms to get...
x/3 = cost
y/3 = sint
Now just square and add the two ... t would be eliminated...

Answer 3

i dont understand

Answer 4

Explain what is confusing you... Here 't' is a parameter which is eliminated...
When you add, the L.H.S would be cos^2t + sin^2 t =1... thus no terms of 't'...