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plotting a complex function

Question asked by Lina Pol on Feb 17, 2017

Hello ,i have converted a polar function into a Cartesian but i cant  separate x from Y ,

what can i do?

i tried to create it by coordinated but its says that its self intersecting ,although i plotted it in excel and matlab and its not.

phi=0.87*sin((log(r)*pi)/(log(tau)));

into

atan(y/x) == (87*sin((pi*log((x^2 + y^2)^(1/2)))/log(tau)))/100

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