Question

A man 2m high observes the angle of elevation to the top of a building to be 68, and the angle of depression to the bottom of the building to be 21. How tall is the building?

Answer 1

First use tan to work out what the horizontal shared plane is, using the angle 21 degrees and the opposite length of 2 m.

Answer 2

Then use the length of the plane to work out the opposite length for the triangle with angle 68 using tan

Answer 3

Then add 2m to that answer. Then your done :)

Answer 4

Thank You :)