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NENA458 Group Title

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

  • one year ago
  • one year ago

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  1. CalebBeavers Group Title
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    |dw:1349712227803:dw|

    • one year ago
  2. CalebBeavers Group Title
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    Do you know what to do now that its drawn out?

    • one year ago
  3. NENA458 Group Title
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    no

    • one year ago
  4. CalebBeavers Group Title
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    Do you know that the cosine of an angle equals the adjacent side over the hypotenuse? So: cos(72)=x/20

    • one year ago
  5. NENA458 Group Title
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    i really dont know what to do

    • one year ago
  6. littlepixie99 Group Title
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    What 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)

    • one year ago
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