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3 cards from this section. Quick, good the night before a test.
Define angle of elevation.
Think about looking upwards.
Define angle of depression.
Think about looking down.
What is the angle of elevation?
Think about looking at something above you.
Is the angle of depression equal to the angle of elevation from the lower point?
Consider the angles formed from the same points.
An observer at a distance of 60 m from a tower sees the top of the tower at an angle of elevation of 30°. Calculate the tower's height using the tangent function.
Use the tangent opposite/adjacent.
A boat is 100 m from the shore. The angle of depression from the top of a lighthouse is 45°. Find the height of the lighthouse.
Think about how tan relates to the height and distance.
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