Hello,

plz try to solve that question.Thanks

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- Apr 15th 2007, 09:11 AMm777orthognality of two surfaces.........
Hello,

plz try to solve that question.Thanks - Apr 16th 2007, 12:09 AMearboth
Hello,

unfortunately I cann't offer you a solution.

I've attached a diagram of both surfaces:

x² + y² + z² = 9 describes a sphere with the origin as it's center and the radius = 3

z² = x² + y² describes a double-cone with the origin as it's vertex .

The locus where both surfaces intersect are 2 circles.

To show that these surfaces are orthogonal you have to show that the normal vectors of the surfaces are orthogonal. You are refering to a "condition of orthogonality", so maybe you can use this condition.

Hope this helps a little bit.