anonymous
  • anonymous
Urgent Help Please : A ladder leans against a building. The angle of elevation of the ladder is 70°. The top of the ladder is 25 ft from the ground. To the nearest tenth of a foot, how far from the building is the base of the ladder? 20.5 ft 30.5 ft 32.3 ft 39.5 ft
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
anonymous
  • anonymous
|dw:1433195125194:dw|
anonymous
  • anonymous
is that 27 ?

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anonymous
  • anonymous
|dw:1433195241549:dw|
anonymous
  • anonymous
|dw:1433195262939:dw|
anonymous
  • anonymous
so we are solving for x
anonymous
  • anonymous
im sorry 25 feet y i had 27 feet
anonymous
  • anonymous
it's okay ^^.
anonymous
  • anonymous
you will either use tangent sine or cosine for the answer
anonymous
  • anonymous
which one do you think will work?
anonymous
  • anonymous
Tangent
anonymous
  • anonymous
\[\tan =\frac{ opposite }{ adjacent? }\]
anonymous
  • anonymous
sine ?
anonymous
  • anonymous
no cosine
anonymous
  • anonymous
\[\cos70 =\frac{ x }{ 25 }\]
anonymous
  • anonymous
then u cross multiply
anonymous
  • anonymous
25cos(70)=x
anonymous
  • anonymous
plug that in your calculator and see what you get
anonymous
  • anonymous
8.55
anonymous
  • anonymous
is that an option?
anonymous
  • anonymous
no..did I do something wrong?
anonymous
  • anonymous
im not sure maybe i did
anonymous
  • anonymous
@ amielli Thx for trying
anonymous
  • anonymous
i dont know where I went wrong .. sorry i couldnt help much

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