They've given us, I guess, our rate of change of x with respect to time is constant at three meters per minute, and we know what y is at that moment. Let's see. Can we create a relationship? Because they gave us dx dt, it'll actually be more useful to find a relationship between x and theta, and then take the derivative of both sides, and then use this information, possibly, to figure out what the appropriate value of x or theta is at that moment. Let's do that. How does x relate to theta? Well, we use a little bit of trigonometry right over here.