Homework Help: math

Posted by Anonymous on Saturday, February 2, 2013 at 2:13am.

an airplane is flying at a height of 2 miles above the level ground. the angle of depression from the plane to the foot of a tree is 15 degree. Find the distance that the plane must fly to be directly above the tree.

math - Reiny, Saturday, February 2, 2013 at 9:03am
tan 15° = 2/x
x = 2/tan15 = 7.464 miles

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