8.5 Angles of Elevation and Depression.pdf
8.5 Angles of Elevation and Depression.pdf
8.5 Angles of Elevation and Depression.pdf
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<strong>8.5</strong> <strong>Angles</strong> <strong>of</strong> <strong>Elevation</strong> <strong>and</strong> <strong>Depression</strong>March 10, 2010Example #4: A ship, <strong>of</strong>fshore from a vertical cliff knownto be 100 feet in height, takes a sighting <strong>of</strong> the top <strong>of</strong> thecliff. If the angle <strong>of</strong> elevation is found to be 25 o , how far<strong>of</strong>fshore is the ship?25 o 100 fttan 25 o = 100x =x100tan 25 oxx ≈ 214.45 feetApr 257:05 PM9
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