Eurolear's Use Ust 9 The diagram below shows a vertical flagpole, BE, and a raised flag. The distance from the bottom of the pole to the top of the flag, BA, is 4.2m. The point C is 6.2 m away from B on level ground. 4.2 Et 28° 6.2 (a) Describe the locus of C. (b) Calculate the angle of elevation of A from C. (c) The angle of elevation of the bottom of the flag, D, from C is 28°. Calculate AD. TOF 22 C 6.2 = 512X 6.2

To determine the angle of elevation of a star in the sky, you align the star and the top of the backboard of a basketball hoop that is 5 feet higher than your eyes in your line of vision (see figure). Your horizontal distance from the backboard is 12 feet. What is the angle of elevation of the star?

Albert lives in New Orleans. At noon on a summer day, the angle of elevation of the sun is 84. The window in Alberts room is 4.0 feet high and 6.5 feet wide. (Sec Figure 24.) a. Calculate the area of the floor surface in Alberts room that is illuminated by the sun when the angle of elevation of the sun is 84. b. One winter day the angle of elevation of the sun outside Alberts window is 37. Will the illuminated area of the floor in Alberts room be greater on the summer day, or on the winter day? Figure 24

The Learning Tower of Pisa The bell tower of the cathedral in Pisa, Italy, leans 5.6 from the vertical. A tourist stands 105 m from its base, with the tower leaning directly toward her. She measures the angle of elevation to the top of the tower to be 29.2. Find the length of the tower to the nearest meter.