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from a point of 100ft from the base of the cliff, Kim measures the angle of elevation to a ledge on the side of the cliff to be 42 degrees. Find the height of the ledge from the base of the cliff, to the nearest foot
 Jan 30, 2012
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You have been given a right triangle. The side adjacent to the 42 degree angle is 100'; call the side opposite the 42 degree angle h, the height of the cliff.

tan 42 = h/100 => h = 100(tan 42) = 100(0.900)
So h = 90 feet.
 Jan 31, 2012

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