Either of two unit circles passes through the center of the other. How do you prove that the common area is
An airplane pilot wishes to fly due west. A wind of 80.0 km/h (about 50 mi/h) is blowing toward the south.
(a) If the airspeed of the plane (its speed in still air) is 320.0 km/h (about 200 mi/h), in which direction should the pilot head?
(b) What is the speed of the plane over the ground? Draw a vector diagram.