I have a specific question about reversing $a\tan2$. (I am programmer, sorry for the jargon). I also use the $a\tan2$ function in my example, but I think everybody knows what it means.
radial = 1.12*PI => transformed = -atan2(cos(radial)∗2,sin(radial)*1.5)
Is there a way to reverse the transformed value to the start radial, without knowing the start radial? This is how codeflow should be
radial => transform(radial) => transformback(transform(radial)) => radial.
I have searched on the web (incl. stack) but I couldn't find any correct code. Also looked on Wikipedia, but it was overwhelming. My question is more a algebra question I think ;).
Let me know what you think!