The Gateway Arch in St. Louis is 630 feet. If a person is walking away from the Arch until the angle of elevation to the top is 55 degrees, how far from the Arch is the person?

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A:

Ratios

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

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.