Asked by DeJohn

A biologist wants to know the width w of a river to properly set instruments for an experiment. From point A, the biologist walks downstream 100 feet and sights to point C (see figure). From this sighting, it is determined that
πœƒ = 50Β°.
How wide is the river? (Round your answer to one decimal

Answers

Answered by oobleck
you don't say how πœƒ is measured, but if C is directly across from A, and the width is w, then
w/100 = tanπœƒ
or
w/100 = cotπœƒ
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