To measure the width of a river, a ranger sights a tree across a river about 60 degrees north of east. On the map, her position is marked A. She then walks along the river to position B and sights the same tree at 40 degrees north of west. If each unit on the map is 1 mile, about how many miles from her current position is the tree? answer choices:
a) law of sines, the distance is about 3.0 miles
b) law of sines, the distance is about 3.6 miles
c) none of these answers are correct
d) law of cosines, the distance is about 3.0 miles
e) law of cosines, the distance is about 3.4 miles