the horizontal distance between two trees of different heights is 60m. the angle of depression of the top of the first tree when seen from the top of the second tree is 45degree.of the height of the second tree is 80m.find the height of the first tree.

Question

anonymous · Answer

Is this trigonometry?

mathlegend · Answer

I think Geometry.

jim_thompson5910 · Answer

If you draw out the picture, you'll get something like this

|dw:1353198590189:dw|

jim_thompson5910 · Answer

You can further update the picture to get

|dw:1353198721460:dw|

This is a 45-45-90 triangle