20° 20° 6' 4" 10'
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.
Photography A camera is mounted on a tripod 4 feet high
at a distance of 10 feet from George, who is 6 feet tall. See
the illustration. If the camera lens has
and elevation of 20°, will George’s feet and head be seen
by the lens? If not, how far back will the camera need to be
moved to include George’s feet and head?
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