22: A 13 ft ladder is leaning against a wall when its base started to slide away. By the time the base is 12 t from the wall, the base is moving at rate of 5 ft/sec. a) How fast is the top of the ladder sliding down the wallI? b) At what rate is the area of the triangle formed by the ladder, wall, and the ground changing then? c) At what rate is the angle 0 between the ground and the ladder changing? 13-ft ladder

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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.