Asked by Anonymous
From a point 120m from the foot of a building, the angles of elevation of the top and bottom of the flagpole are 49 degrees and 46 degrees respectively. Find the height of the flagpole (answer 13.8m)
I couldn't get the answer because I thought the question was worded weird. But how would you do it?
I couldn't get the answer because I thought the question was worded weird. But how would you do it?
Answers
Answered by
bobpursley
The issue really is how is the 120m measured...horizontally, or not. I suspect there is a picture that tells you.
Assuming horizontal distance...
height to top of flagpole: 120Tan49
height to base of flagpole: 120Tan46
height of pole is the difference, or
120 (tan49-tan46)=13.8m
Assuming horizontal distance...
height to top of flagpole: 120Tan49
height to base of flagpole: 120Tan46
height of pole is the difference, or
120 (tan49-tan46)=13.8m
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