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When a 15m ladder is leaning against the wall it reaches 12m. What is the angle of the ladder from the ground?

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When a 15m ladder is leaning against the wall it reaches 12m. What is the angle of the ladder from the ground?

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  1. sinx=12/15=4/5

    so x=53 degrees  ANSWER


  2. sin x=12/15=0.8

    x=arcsin0.8=about 54 degree

  3. use basic trigo.

    sin x = base / hypotenuse

    sin x = 12/15

      x = 53.13

  4. sin Ó¨ = 12 / 15

    Ө = 53.1 °
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