plot3d(cos((((log(log(0.5)/log(2))^4)^0.25)/x))*cos((((log(log(0.5)/log(2))^4)^0.25)/y)), [x, -%pi, %pi], [y, -%pi, %pi], [grid, 50, 50]);
no function
plot3d(cos(%pi/x))*cos(%pi/y)), [x, -%pi, %pi], [y, -%pi, %pi], [grid, 50, 50]);
cos(%pi/x)*cos(%pi/y)Use grid values with multiples of 25 and look at the number of pillars and curves, think of 4 and somewhat 25 when looking.