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NENA458
 3 years ago
The angle of elevation of a ladder leaning against a wall is 72 degree. If the ladder is 20 feet long, how far is the base of the ladder from the wall?
A, 6.2 ft b. 16.73 ft C. 19.02 ft D.21.02ft
NENA458
 3 years ago
The angle of elevation of a ladder leaning against a wall is 72 degree. If the ladder is 20 feet long, how far is the base of the ladder from the wall? A, 6.2 ft b. 16.73 ft C. 19.02 ft D.21.02ft

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CalebBeavers
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1349712227803:dw

CalebBeavers
 3 years ago
Best ResponseYou've already chosen the best response.0Do you know what to do now that its drawn out?

CalebBeavers
 3 years ago
Best ResponseYou've already chosen the best response.0Do you know that the cosine of an angle equals the adjacent side over the hypotenuse? So: cos(72)=x/20

NENA458
 3 years ago
Best ResponseYou've already chosen the best response.0i really dont know what to do

littlepixie99
 3 years ago
Best ResponseYou've already chosen the best response.0What you have to do is look at triganomitry, you have the length of the hypotanuse and need the length of the side adjacent to the angle  therefore you Cos The angle is 72, so its cos(72) = adj/hyp = adj/20. so times both sides by 20 = 20*cos(72) = the distance of the wall from the base of the ladder Equals 6.18 (2dp)
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