Trigo

From a window of a building A, the angle of elevation of the top of building B is 35 degrees and the angle of depression of the bottom of building B is 20 degrees. If the buildings are 25m. horizontally apart, Compute for height of the window from the ground? And compute for height of Building B?

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  1. Let H be the window height, and X = 25 X = 25 m be the separation of buildings.

    L tan20 = H
    H = 9.10 m

    Building B height = H + L tan 35
    = 9.10 + 17.51 = 26.61 m

    Draw yourself a figure and these relationships sould be obvious to you.

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