Multivariable Calculus Tangent Planes Determine the tangent flat surface to a given equation with the help of a calculating device. Find the flat surface that touches a particular spot on a diagram. Use this efficient resource to determine the slope and orientation of the plane at various points along the expression. Get precise results right away with our handy tangent plane computation tool. Uncover the tangent line plane today for a enhanced understanding of your expression's behavior.