EasyCalculusca-360

Tangent Plane Normal Vector

Problem

For a surface z = f(x, y), the tangent plane at a point has normal vector [-f_x, -f_y, 1].

Given the two partial derivatives at the point, return the normal vector.

Hint

Move the partial derivatives to the left side of z - f(x, y) = 0.

case 1

in: [1,2]

expected: [-1,-2,1]

case 2

in: [0,0]

expected: [0,0,1]

case 3

in: [-3,0.5]

expected: [3,-0.5,1]

Starter codePython

def tangent_plane_normal(fx, fy):
    # Your code here
    pass

3 test cases · run your code against them in the editor