16* A surveyor sees a building across the river. Standing at point A he measures the angle of ele- vation from the ground to the top of the building to be 30 degrees. He steps back 100 feet and again measures the angle of elevation and finds it to be 15°. (See Figure 12.26.) Assuming that it makes a 90-degree angle with the floor, approximately how tall is the building? B 15° 100 A 30° river Figure 12.26 building

16* A surveyor sees a building across the river. Standing at point A he measures the angle of ele- vation from the ground to the top of the building to be 30 degrees. He steps back 100 feet and again measures the angle of elevation and finds it to be 15°. (See Figure 12.26.) Assuming that it makes a 90-degree angle with the floor, approximately how tall is the building? B 15° 100 A 30° river Figure 12.26 building

Algebra and Trigonometry (MindTap Course List)

4th Edition

ISBN:9781305071742

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter5: Trigonometric Functions: Right Triangle Approach

Section5.5: The Law Of Sines

Problem 35E: The Learning Tower of Pisa The bell tower of the cathedral in Pisa, Italy, leans 5.6 from the...

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