[QUOTE=jimC;168457]1)From the window of one building, Matt finds the angle of elevation to the top of a second building to be 33degrees and the angle of depression to the bottom of the same building to be 55degrees. The buildings are 25m apart. Find the height of the second building.

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1) Make a sketch. Draw a horizontal line from Matt's eye to the next building. As you easily can see you are dealing with 2 right triangles.

Use the tan-function:

Then the height of the building is

For your confirmation only: