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anonymous

  • one year ago

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

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  1. anonymous
    • one year ago
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    @perl

  2. anonymous
    • one year ago
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    |dw:1433195125194:dw|

  3. anonymous
    • one year ago
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    is that 27 ?

  4. anonymous
    • one year ago
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    |dw:1433195241549:dw|

  5. anonymous
    • one year ago
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    |dw:1433195262939:dw|

  6. anonymous
    • one year ago
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    so we are solving for x

  7. anonymous
    • one year ago
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    im sorry 25 feet y i had 27 feet

  8. anonymous
    • one year ago
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    it's okay ^^.

  9. anonymous
    • one year ago
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    you will either use tangent sine or cosine for the answer

  10. anonymous
    • one year ago
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    which one do you think will work?

  11. anonymous
    • one year ago
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    Tangent

  12. anonymous
    • one year ago
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    \[\tan =\frac{ opposite }{ adjacent? }\]

  13. anonymous
    • one year ago
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    sine ?

  14. anonymous
    • one year ago
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    no cosine

  15. anonymous
    • one year ago
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    \[\cos70 =\frac{ x }{ 25 }\]

  16. anonymous
    • one year ago
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    then u cross multiply

  17. anonymous
    • one year ago
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    25cos(70)=x

  18. anonymous
    • one year ago
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    plug that in your calculator and see what you get

  19. anonymous
    • one year ago
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    8.55

  20. anonymous
    • one year ago
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    is that an option?

  21. anonymous
    • one year ago
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    no..did I do something wrong?

  22. anonymous
    • one year ago
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    im not sure maybe i did

  23. anonymous
    • one year ago
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    @ amielli Thx for trying

  24. anonymous
    • one year ago
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    i dont know where I went wrong .. sorry i couldnt help much

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