Find an Equation of the Tangent Plane to the Surface $\mathbf { r } ( u , v ) = ( u + v ) \mathbf { i } + u \cos v \mathbf { j } + v \sin u \mathbf { k }$

Essay

Find an equation of the tangent plane to the surface given by $\mathbf { r } ( u , v ) = ( u + v ) \mathbf { i } + u \cos v \mathbf { j } + v \sin u \mathbf { k }$ at the point $( 1,1,0 )$ .