From the top of a 45-m high building, an observer sees a car heading toward the building at an angle of depression of 15°. After some time, the angle of elevation to the car is 30°. What is the distance that the car has travelled? Express your answer to the nearest meter.
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.
From the top of a 45-m high building, an observer sees a car heading toward the building at an
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