sentences:  However, since the wind direction varies quickly the turbine will not strictly follow the direction and will have a small yaw angle on average.The power output losses can simply be approximated to fall with (cos(yaw angle))3.Particularly at low-to-medium wind speeds, yawing can make a significant reduction in turbine output, with wind direction variations of ±30° being quite common and long response times of the turbines to changes in wind direction.