Question

You are standing on a footbridge in a city park that is 12 feet high above the pond. You look down and see a duck in the water 7 feet away from the footbridge. What is the angle of depression?

Answer 1

opposite/adjacent= cosine
cos B= opp/adj

cosB= 7/12
B=cos^-1 (7/12)
(Type it into a graphing calculator)
B=54.3 degrees

Make sure your calculator is in degree mode and you use the inverse cosine.