Motorcycle Trail The head angle on a motorcycle is the angle between the horizontal...

Motorcycle Trail The head angle on a motorcycle is the angle between the horizontal and the slanted line through the steering head. The distance along the ground between the line through the steering head and the vertical line through the center of the wheel is the trail. See the accompanying figure. The radius of the wheel on this author's Road King is 13.3 inches and the head angle is 64°. Find the trail.