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OpenStudy (anonymous):
An observer on level ground is at a distance d from a building. The angles of elevation to the bottom of the windows on the second and third floors are c and a respectively. Find the distance h between the bottoms of the windows in terms of c,a, and d.
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OpenStudy (anonymous):
I believe this will help. http://en.wikipedia.org/wiki/Cosine#Sine.2C_cosine.2C_and_tangent hint: you will be using cosine
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