How to solve Parametric Equations with Trig functions that have attached coefficents to T

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Can anyone walk me through how to find the parametric curve for

x=3*sin(2t), y = 1.5*cos(t)?

If the parametric equations were x = 3*sin(t), y = 1.5*cos(t) I know I would solve it the following way:

x/3 = sin(t), y/1.5 = cos(t) --> (x/3)^2 + (y/1.5)^2 = 1

What's really confusing me is the 2 that is being multiplied to t.

Thanks in advance

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$$\dfrac xy=4\sin t$$

So, $$(x/4y)^2+(2y/3)^2=1$$