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  1. #1
    Registered User rjsci13's Avatar
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    Trigenometry Question

    I was having trouble with this question so if you know the answer please post it and tell me how you solved it:
    You are looking up at the top of a building at 30 degrees. If the building is 20 m tall, how far are you from the building? Assume that you are 1.70 m tall.

    Thanks
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  2. #2
    Banned ballsoftitanium's Avatar
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    31.71m
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    Originally Posted by ballsoftitanium
    31.71m
    how did you get that?
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    soh
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    Message Board King best regards's Avatar
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    31.71m
    Goal of June football camp = 400lb squat

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    Since you are 1.7m tall, the building is 18.3 taller than you are.
    Let x = the distance you are from the building

    tan(30) = 18.3 / x

    x tan(30) = 18.3

    x = 18.3 / tan(30)

    I get 31.6965 and change
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  7. #7
    Message Board King best regards's Avatar
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    best regards is offline
    Originally Posted by skippy
    Since you are 1.7m tall, the building is 18.3 taller than you are.
    Let x = the distance you are from the building

    tan(30) = 18.3 / x

    x tan(30) = 18.3

    x = 18.3 / tan(30)

    I get 31.6965 and change
    got 31.7 oh well guess it rounded.
    Goal of June football camp = 400lb squat

    Farwell, my friends. I'll be back some day. Just need to get my head screwed on straight.

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  8. #8
    Will dance for mass Woody72's Avatar
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    Ermm.. ouch, my brain?
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  9. #9
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    Originally Posted by getting2big
    how did you get that?
    with ease

    jk man, i got it the same way as skippy
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