Asked by andre
from a point A on the side of straight road, the angle of elevation of the top of the electric pole is 15°20'. from a point B on the same side of the road, the angle of elevation of the top of the pole is 10°52'. If the distance of A and B is 50 meters, what is the height of the pole?
Answers
Answered by
Steve
review the tangent function. Draw a diagram. You can see that if the pole has height h, then
h cot15°20' + h cot10°52' = 50
That is if A and B are on opposite sides of the pole.
If they are on the same side, then B is farther away than A, and
h cot10°52' - h cot15°20' = 50
So, make up your mind.
h cot15°20' + h cot10°52' = 50
That is if A and B are on opposite sides of the pole.
If they are on the same side, then B is farther away than A, and
h cot10°52' - h cot15°20' = 50
So, make up your mind.
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