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Functs of several var.



The x-coordinate of a point is its distance in front of the yz-plane.
(If the x-coordinate is negative, the point is behind the yz-plane.)
The y-coordinate of a point is its distance to the right of the xz-plane.
(If the y-coordinate is negative, the point is to the left of the xz-plane.)
The z-coordinate of a point is its height above the xy-plane.
(If the z-coordinate is negative, the point is below the xy-plane.)





http://people.hofstra.edu/faculty/Stefan_Waner/RealWorld/Calcsumm8.html

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--Last edited by saucer on 2007-01-07 06:08:07 --