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March 25, 2017

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From h a point A that is 10 meters abov level ground, the angle of elevation of the top a building is 42 degrees and the angle of depression of the base of the building is 8 degrees approximate the height of the building

  • Pre calculus - ,

    Let the building height be Y
    Let the horizontal distance to the building be h.

    h tan 42 = a
    h tan 8 = b

    Y = a + b = h (tan42,+ tan 8)

    For the value of h, use
    h tan 8 = 10 m

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