When melonie looks at the top of a tower, the angle of elevation is 27 degrees. when melonie walks 20m further away from the tower on level ground, the angle of elevation decreases to 20 degrees. what is the height of the tower?

Answer 1

Draw the diagram, and review your basic trig functions. Then it should be clear that the height h can be found using

h cot20° - h cot27° = 20
so,
h = 20/(cot20° - cot27°)