Aship is sailing due west when the captain sees a lighthouse at a distance of 20 km on a bearing of 230°.
a) draw a diagram to model this situation
b) how far must the ship sail before the lighthouse is 16 km away?
c) how far must the ship sail beyond the point in b before the lighthouse is again at a distance of 16 km from the ship?
d) what is the bearing of the lighthouse from the ship the second time the two are 16 km apart?