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.
121. Linear vs. Angular Speed A rotating beacon is located
1 kilometer off a straight shoreline (see figure). The beacon
rotates at a rate of 3 revolutions per minute. How fast (in
kilometers
per hour) does the beam of light appear to be
moving
to a viewer who is 12
kilometer down the shoreline?
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