For the function ((x, y) = tan((x2 + y2) / 64), find the second order Taylor approximation

Question:

For the function ((x, y) = tan((x2 + y2) / 64), find the second order Taylor approximation based at (x0, y0) = (0, 0). Then estimate ((0.2, -0.3) using
(a) The first order approximation,
(b) The second order approximation, and
(c) Your calculator directly.