71. A scientist standing at the top of a mountain 2 mi above sea 2 mi 1.82° level measures the angle of depression to the ocean horizon to be 1.82°. Use this information to approximate the В radius of the Earth to the C nearest mile. (Hint: The line of sight AB is tangent to the Earth and forms a right angle with the radius at the point of tangency.)

Q: 2. From an angle of depression of 40°, John watches his friend approach his building while standing…

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Q: BC because EF AB AC If AABC ~ ADEF then we can prove DE DF

A: To see 2nd step

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Q: A 45 foot tall telephone mast r feet from an observer subtends an angle of 1.75°.

A: Solution

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Q: Find the distance along an arc on the surface of the earth that subtends a central angle of 8…

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A: Draw a diagram depicting this scenario . Use the cosine rule to find the distance across the gorge.