Find \frac{dy}{dx} at an arbtrary point on this curve ln(x^2+y^2)\, =\,2arcsin \,\frac{x}{y} My attempt to solution: \frac{1}{x^2+y^2}2x+(4y^2)(\frac{dy}{dx})=2\frac{1}{\sqrt1-(\frac{x}{y})^2}\frac{y-x\frac{dy}{dx}}{y^2} Here l get stuck...