Asked by Lily
The angle of elevation from a boat to the top of a cliff is 42 degrees. When the boat moves 15 feet closer to the cliff, the angle of elevation increases to 54 degrees. How tall is the cliff?
Answers
Answered by
Steve
draw a diagram. Review the cotangent function. Then you will see that if the cliff has height h feet,
h cot42° - h cot54° = 15
h cot42° - h cot54° = 15
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