Mapping a curve using equation

[parametriccuriosity]

Hello I am trying to map a curve using the equation given on the following link

Sine around circle | Desmos

I tried to make coordinates using expression given at this page but unable to achieve the RED curve shown on this link. Can anyone please guide me what I am doing wrong in my script. In my understanding I have achieved polar coordinates as per the given equation on this page, So I have used construct point to achieve points and eventually used interpolated curve.

sine curve1.gh (12.5 KB)

[DanielPiker]

It looks like you have your brackets in a different place to the Desmos example

[parametriccuriosity]

Thank you Daniel for your input. Got the curve.