Prove that every line normal to the cone with equation z=sqrt(x^2+y^2) intersects the z-axis.
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Originally Posted by esum0209 Prove that every line normal to the cone with equation z=sqrt(x^2+y^2) intersects the z-axis. Define the normal line to this surface at any given point is given by the parametric equations . Now prove that there exists ... Tonio
Originally Posted by tonio Now prove that there exists ... Tonio Sorry, but I don't know to prove this... Can u help me a bit more? Thanks in advance
What happens if
Originally Posted by esum0209 Sorry, but I don't know to prove this... Can u help me a bit more? Thanks in advance No. If you're dealing with partial derivatives you must be able to cope with this: show that the solution to is the same as the solution to . This is HS stuff. Tonio
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