Math CentralQuandaries & Queries


Question from Mary-Beth, a teacher:

Two towers are 30 m apart. From the 15th floor, 40 m up, find the angle of depression to the base of the taller tower? I think the answer is 53, but the answer book says 37.

Hi Mary-Beth,

I also got 53 degrees. Since 53 + 37 = 90 it looks to me that this was a slip by the author who found the inverse tangent of the wrong fraction. I would look at the definition in the textbook however to make sure the the author is calling the correct angle the angle of depression.


About Math Central


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.
Quandaries & Queries page Home page University of Regina PIMS