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10 July, 12:14

A 25 foot long ladder is proper against a wall at an angle of 18° with the wall. How high up the wall does the ladder reach?

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  1. 10 July, 12:36
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    Cosine 18° = adjacent / hypotenuse = Wall height / ladder length

    Cosine 18° = Wall Height / 25

    0.95106 = Wall Height / 25

    Wall Height = 23.7765 feet
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