A visualization of a classic related rates problem - a radar station tracking a launching rocket.[br][br]A rocket is launched vertically and is tracked by a radar station located on the ground 5 km from the launch pad. Suppose that the elevation angle [math]\theta[/math] of the line of sight to the rocket is increasing at 3 degrees per second when [math]\theta = 60[/math] degrees. What is the velocity of the rocket at that instant?