At the edge of a cliff, 250m above the ocean, Mr. Young looks out at two fishing boats. Mr. Young uses his iPhone app to estimate the angle of depression to the first boat to be 3° and 4° to the second boat. Using the compass app, Mr. Young estimates the horizontal angle between the two boats to be 70°. Determine how far the boats are apart.

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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.