# trig

Your search for A surveyor is trying to determine the width of a river. He forst stands at point A, directly opposite a tree at point B. He then walks 100 feet to point C. He measures the acute angle at point C to be 79 degrees. What is the width of the river?

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1. w/100 = tan 79°

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2. think twice, type once...

100/w = tan 79°

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3. 36

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