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19-03-2017
Mathematics

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With the sun at an angle of 30 to the ground, a tree casts an 80 ft shadow. how tall is the tree

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Аноним Аноним

19-03-2017

let tree's height = h

h/80 = tan 30
⇒ h = 80 tan 30
⇒ h = 80 * 1/√3
⇒ h = 46.19 ft

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