To find the distance from a house at point A that is on one side of a river to a house at point B on the other side of a river, a surveyor walks off a distance of 100 feet to point C on the same side of the river as point A. He then determined that the angle at point A is 40 ̊ and at point C is 50 ̊. Determine the distance between point A and B.
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.
To find the distance from a house at point A that is on one side of a river to a house at point B on the other side of a river, a surveyor walks off a distance of 100 feet to point C on the same side of the river as point A. He then determined that the angle at point A is 40 ̊ and at point C is 50 ̊. Determine the distance between point A and B.
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