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Math Help - Angle

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    Angle

    A line from a point on level ground to the top of a building is 640 feet long. The building is known to be 528 feet away from this point. What angle does this line make with the ground?
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    Quote Originally Posted by christenc05 View Post
    A line from a point on level ground to the top of a building is 640 feet long. The building is known to be 528 feet away from this point. What angle does this line make with the ground?

    \theta = cos^{-1}\frac{528}{640}
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