A small plane flies horizontally on a line 400 m directly above an observer with a speed of 70 m/s. Let θ be the angle of elevation of the plane. What is the rate of change of the angle of elevation, dθ/dt , when the plane is 500 m past the observer?
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 small plane flies horizontally on a line 400 m directly above an observer with a speed of 70 m/s. Let θ be the angle of elevation of the plane. What is the rate of change of the angle of elevation, dθ/dt , when the plane is 500 m past the observer?
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