tower stands tall at 30ft. Person A walks away from the tower at a constant rate of 3ft/s. A spotlight lies at the top of the tower and person B, holding the spotlight, follows person A with the spotlight as he walks. Find the rate (in rad/s) in which the lamp is rotating at the moment when person A is 30 feet away from the tower.

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Q: against

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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.