Robot4 (tm) is a Robotic Arm Movement program where the arm is moved from a given position to a desired
position. The program finds the angles necessary for the desired position. (I think this is the idea!) Problem came from NASA.

Robot4 is an Inverse Problem(IP) example. It wants to solve how to move from starting point 'A' to target point 'B'.
Solutions to IPs are easy with a Calculus-level Programmation Langue. See file 'Rob4User.fc' for solution code.