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# Pc 4.3 notes_applications

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Some Application problems involving right-triangle trig.

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### Pc 4.3 notes_applications

1. 1. 4.3 Notes Continued… Application Problems! Angle of elevation/depression: Angle made with the horizontal
2. 2. Ex. 1) A surveyor is standing 115 ft. from the Washington Monument. He measures the angle of elevation to the top of the monument as 78.3°. How tall is the Washington Monument?
3. 3. Ex. 2) A lighthouse is 200 yards from a bike path. The walkway to the lighthouse is 400 yards long. Find the angle between the bike path and walkway.
4. 4. Ex. 3) A 40-ft. lighthouse is on top of a 250 ft. cliff. The lighthouse spots a sailboat at 12 pm. The angle of depression to the boat is 3°. After a few hours, the angle of depression to the boat is now 10°. How far has the boat sailed during those few hours?
5. 5. Assignment: #14 p. 309 #59-70 (all)