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Math Help - bearing word problem, help?

  1. #1
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    Question bearing word problem, help?

    What its asking for is really confusing me..

    A sign on a roadway at the top of a mountain indicates that for the next 4 miles the grade is 10.5 degrees. Find the change in elevation over a distance for a car descending the mountain.
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  2. #2
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    Hello VNVeteran
    Quote Originally Posted by VNVeteran View Post
    What its asking for is really confusing me..

    A sign on a roadway at the top of a mountain indicates that for the next 4 miles the grade is 10.5 degrees. Find the change in elevation over a distance for a car descending the mountain.
    If the angle of the grade is \theta, then
    \sin\theta = \frac{\text{opposite}}{\text{hypotenuse}}
    = \frac{\text{change in vertical elevation}}{\text{distance travelled down the road}}
    Can you complete it now?

    Grandad
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