Points of intersection between implicit f(x,y,z)=0 and explicit z=z(x,y) surfaces

f(x,y,z): x^2*cos(x)+y^2*cos(y)+z^2*cos(z)=0 and z(x,y)=x^2+y^2

implicit surface: x^2*cos(x)+y^2*cos(y)+z^2*cos(z)=0 x,y,z∈[-5,5];

implicit surface: x^2*cos(x)+y^2*cos(y)+z^2*cos(z)=0    x,y,z∈[-5,5];

implicit surface: x^2*cos(x)+y^2*cos(y)+z^2*cos(z)=0 x,y,z∈[-5,5];

implicit surface: x^2*cos(x)+y^2*cos(y)+z^2*cos(z)=0    x,y,z∈[-5,5];

3D- Implicit surface grapher

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