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Mimi_x3

  • 4 years ago

The elevation angles of the tree top from Kevin and Lisa standing on the ground are respectively 40° and 30°. The bearings of Kevin and Lisa from the tree foot are respectively due East and SE. If the tree is 20m high, how far apart are Kevin and Lisa, correct to the nearest metre?

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  1. shanna
    • 4 years ago
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    631.891 meters

  2. Mimi_x3
    • 4 years ago
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    Um, how did you get the answer ?

  3. shanna
    • 4 years ago
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    distance of Kevin from tree x = 20/tan(40)=23.835 distance of Lisa from tree x = 20/tan(30)=34.641 |dw:1316064174096:dw| distance between Kevin and Lisa = 34.641^2 - 23.835^2 =631.891 meters

  4. Mimi_x3
    • 4 years ago
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    tyvm for drawing it (:

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