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A ladder, leaning against a wall, makes an angel 60¡ã with the horizontal. If the foot of the ladderis 2.5 m away from the wall, find the length of the ladder

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  1. cn u help me

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  2. draw a diagram.
    review your basic trig functions.

    Now it is clear that

    2.5/x = cos60°

    now just solve for x, the length of the ladder.

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  3. Draw a diagram first
    Then let the base be 2.5m i.e AB=2.5
    Cos 60° =b/h = AB/AC
    or,1/2=2.5/AC
    2=AC/2.5
    or, AC =5m

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