An airplane began its descent when it was 0.8 mile above the ground and 10 miles away from an airport, as shown in the diagram below. 0.8 mile 10 miles Which expression represents the measure of the angle of depression (x) ? O A. sin () sin (s) 10 B. ton-1/0.8) 021Illuminate EducationTM Inc.

A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.

Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.