Two airplanes leave an airport, travelling in the same direction. Thirty minutes later, an observer on the ground sees the first plane with an angle of elevation measuring 64 degrees and an altitude of 9000 m. At the same time, the second plane has an angle of elevation of 36 degrees (in the opposite direction) and an altitude of 10 000 m. Find the air distance between the two planes, rounded to the nearest kilometre. Draw the diagram.
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.
Two airplanes leave an airport, travelling in the same direction. Thirty minutes later, an observer on the ground
sees the first plane with an angle of elevation measuring 64 degrees and an altitude of 9000 m. At the same time, the
second plane has an angle of elevation of 36 degrees (in the opposite direction) and an altitude of 10 000 m. Find the air
distance between the two planes, rounded to the nearest kilometre. Draw the diagram.
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