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OpenStudy (praxer):
help me with this.
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OpenStudy (praxer):
$$\frac{xdx+ydy}{xdy-ydx}=\sqrt{\frac{a^2-x^2-y^2}{x^2+y^2}}$$ Solve this differential equation.
OpenStudy (phi):
try substitution: let x = r cos theta and y= r sin theta
OpenStudy (praxer):
okay I will try an post if I get stuck anywhere. Thanks :)
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