Find the equation for the plane tangent to each surface z = f(x, y) at the indicated point.

(a) z = x ³ + y ³ - 7xy, at the point (1, 2, -2)

(b) z = (cos(x))(cos(y)), at the point (0, π/2, 0)

(c) z = (cos(x))(sin(y)), at the point (0, π/2, 1)

Answer rating: 100% (QA)

a Let z fx y x 3 y 3 7xyx 0 y 0 z 0 1 2 2 Equation of the tangent plane at x 0 y 0 z 0 is Now ... View the full answer