matlab已知arctan(x/y)=log(x^2+y^2),求dx/dy

函数y=arctan(1+x^2)求dy/dx 对于等式arctan（y/x）=ln(sqrt(x^2=y^2)),用matlab求:dx/dy. 已知函数arctan(y/x)=ln√((x∧2)+(y∧2)),求dy/dx x^2+y^2=e^(arctan（y/x）),求dy/dx y=(1+x^2)arctan x 用MATLAB求(d^2*y)/dx^2 设函数y=arctan(1+x^2),求dy/dx. 设ln(x^2+y^2)=arctan(y/x),则dy/dx= arctan(y/x)=ln(sqrt(x^2+y^2)),请问dy/dx是什么? ln√(x^2+y^2)=arctan(y/x)的导数dy/dx 计算I=∮1/x*arctan(y/x)dx+2/y*arctan(x/y)dy,L为圆周x^2+y^2=1,x^2+y y=arctan(x+1)^1/2,求dy=? 已知函数y(x)由方程arctan y/x=1/2ln(x^2+ y^2)确定,求dy.