Can someone help me with the conversion of this equation to Cartesian coordinates:(adsbygoogle = window.adsbygoogle || []).push({});

2cosθr+ sinθθ

(Due to formatting limitations, I just made the r_hat and theta_hat components bold-faced)

I know the answer ought to be -(3y^{2})/[(x^{2}+y^{2})+1] but I've tried every variation of the 3 main coordinate transformation eqns that I can think of and haven't gotten anywhere. Those 3 eqns I'm talking about are y=rsinθ, x=rcosθ, and r=sqrt(x^{2}+y^{2}).

Any help would be great. (Not hw related, need to get this for some research I'm working on.)

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# Coordinate system transformation

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