1. Write the polar forms of the equations of two lines, neither of which is vertical, such that the lines intersect at a 90° angle and have normal segments of length 2
2. The diagram at the right shows a robot with a telescoping arm. The "hand" at the end of such an arm is called the manipulator. What polar equation should the arm be programmed to follow in order to move the manipulator in a straight line from the point with rectangular coordinates (5, 4) to the point with rectangular coordinates (15, 4)?
