The function box will accept any input that is a valid equation.
Letters (aside from x,y,z, and r) are variables that can be adjusted
using the boxes on the side. You can use the following in an equation:
- x, y, and z
- r (= sqrt(x2 + y2)
- rho, theta, and phi
In addition, most trig functions are available, including sin,
arctan, and cosh (hyperbolic cos). Some other functions, such as
round, floor, and mod are also allowed.