Question: Solve 30. A forester determines that the angle of elevation (the acute angle between the horizontal and the line of sight) to the top of

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30. A forester determines that the angle of elevation (the acute angle between the horizontal and the line of sight) to the top of a fir tree is 4215', as shown next. Find the measure of ZCBA in degrees, min- utes, and seconds. B 4215' A C

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