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 For safety reasons, the angle between a ladder and the the ground should be between 65° and 80°. A ladder that is 5M long is placed so that

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For safety reasons, the angle between a ladder and the the ground should be between 65° and 80°. A ladder that is 5M long is placed so that it reaches the window on the top floor of a house. If the foot of the ladder is 1.5M from the house, is the ladder safe?

 Oct 30, 2014

Best Answer 

 #1
avatar+130511 
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We know the adjacent side (1.5) and the hypoteneuse(5)....we can use the cosne inverse to find the angle

So we have

cos-1(1.5 / 5) = about 72.54°      ...... it is safe......

 

 Oct 30, 2014

1+0 Answers

 #1
avatar+130511 
+5
Best Answer

We know the adjacent side (1.5) and the hypoteneuse(5)....we can use the cosne inverse to find the angle

So we have

cos-1(1.5 / 5) = about 72.54°      ...... it is safe......

 

CPhill Oct 30, 2014

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