Chapter 14.1, Problem 59E

Use a computer to graph the function using various domains and viewpoints. Gel a printout of one that, in your opinion, gives a good view. If your software also produces level curves, then plot some contour lines of the same function and compare with the graph.

59. $f(x,y)=e^{-(x^2+y^2)/3}(\sin (x^2)+\cos (y^2))$