A helicopter makes a forced landing at sea. The last radio signal received at station C gives the bearing of the helicopter from C as N 58.5° E at an altitude of a = 411 feet. An observer at C sights the helicopter and gives ∠DCB as 12.7°. How far will a rescue boat at A have to travel to reach any survivors at 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.
A helicopter makes a forced landing at sea. The last radio signal received at station C gives the bearing of the helicopter from C as N 58.5° E at an altitude of a = 411 feet. An observer at C sights the helicopter and gives ∠DCB as 12.7°. How far will a rescue boat at A have to travel to reach any survivors at B?
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