A submarine starts on the surface, and dives at a 13 angle to the surface.It goes a diagonal distance of 890 m before reaching the bottom.How deep is the water where the submarine reaches the bottom?

Question

Cont. How far is it along the ocean surface from where the submarine started to directly above where it reached the bottom?

Answer 1

A right triangle is formed by the diagonal path of the submarine, with the diagonal distance of 890 being the hypotenuse.

The 13 degree angle of depression equals the angle on elevation between the submarine at the bottom, so

sin(13) = depth of water/890