for function f(x, y) = sin-1(x2 y2) critical points are found. now a new graph g(x, y) is formed by coupling graphs f(x, y) and f(x, y) = – sin-1(x2 y2). what are the critical points of g(x, y).

for function f(x, y) = sin-1(x2 y2) critical points are found. now a new graph g(x, y) is formed by coupling graphs f(x, y) and f(x, y) = – sin-1(x2 y2). what are the critical points of g(x, y).