Posted by Chloe Mack on Sunday, January 30, 2011 at 7:56pm.
Two surveyors, Joe and Alice, are 240 meters apart on a riverbank. Each sights a flagpole on the opposite bank. The angle from the pole to Joe (vertex) to Alice is 63 degrees. The angle from the pole to Alice(vertex)to Joe is 54 degrees. How far are Joe and Alice from the pole?

PreCalculusTrig  Henry, Monday, January 31, 2011 at 10:36pm
C(3rd angle) = 180  63  54 = 63deg.
If 2 angles(63deg) of a triangle are =
the sides opp. these angles are =.
Therefore, Alice's dist. from pole =
240m.
Using the Law of Sines,
d / sin54 = 240 / sin63,
d = 240sin54 / sin63 = 218m. = Joe's
dist. from pole.
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