Application Of Derivatives

An object is moving in the clockwise direction around the unit circle \(x^2+y^2=1\). As it passes through the point \(\left(\frac{1}{2}, \frac{\sqrt{3}}{2}\right)\), its \(y\)-co-ordinate is decreasing at the rate of 3 units per sec. The rate at which the \(x\)-co-ordinate changes at this point is