1.9 - Example 1.27: Height Calculation of a Lighthouse
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Practice Questions
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What is an angle of depression?
💡 Hint: Think about how you would describe looking down at something.
What does cotangent of an angle represent?
💡 Hint: Recall how tangent is the opposite over adjacent.
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Interactive Quizzes
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What is the height of a lighthouse if the angles of depression to two ships are 30° and 45°?
💡 Hint: Calculate using Height = 100 / (cot(30°) - cot(45°)).
True or False: The angle of depression is always measured upward from horizontal.
💡 Hint: Think about how you observe objects below.
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Challenge Problems
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From the top of a tower, the angles of depression to two points on the ground are 20° and 50°; if they are 150 m apart, find the height of the tower.
💡 Hint: Break down the angles and distances before calculating the difference.
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