I knew how to do this long ago, found the exact problem in my old trig book, but I can't seem to work it out.
Say I'm at an unknown distance from a mountain, called point P, and I estimate the angle of elevation to the top of the mountain is 13.5 degrees. Then I move to point N, which is 100 meters closer to the mountain, and I estimate the angle of elevation to be 14.8 degrees. What is the height of the mountain?
I remember this being enough information to solve both triangles, but without the distance to the mountain, or the height of the mountain, I'm at a loss. Hint's would be appreciated.