Texas Instruments TI-89 Titanium

3D Graphing 374
Effect of Changing eyeq theta
The view on the Graph screen is always oriented along the viewing angle. From this
point of view, you can change
eyeq to rotate the viewing angle around the z axis.
Note: This example increments eyeq by 30.
z1(x,y) = (x
3
y – y
3
x) / 390
In this example eyef =
70
eye
q = 20
eye
q = 50
eye
q = 80