- #1

Pete_01

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## Homework Statement

For the surface with parametric equations r(st)=<st, s+t, s-t>, find the equation of the tangent plane at (2,3,1).

Find the surface area under the restriction s^2 + t^2 <=(lessthanorequalto) 1

## Homework Equations

## The Attempt at a Solution

I already figured out the equation of the tangent plane: -2x+3y-z=4, but I am not sure how to find the surface area? I want to use the SA equation |rs x rt| integrated from ds 0 to 1 and dt 0 to 2pi but i am not having much luck. Any ideas?