Fourier Transform

This surface by Xah Lee, which he calls the Borg Cube, is given by the equation
sin(xy) + sin(yz) + sin(zx) = 0

Using different values of a and b, the equations
x(t) = sin(t/2) - a*sin(bt)cos(t)
y(t) = cos(t/2) - a*sin(bt)sin(t)
produce images such as the ones above.

By Herbert Franke

Plot of the equation Sin(xSin(y)) = Cos(yCos(x)) by Xah Lee

http://demonstrations.wolfram.com/CosineOffsetCurves/