Question

Boating across a river, the current moves you downstream. Instead of going directly across the river, the boat moves at a 10 degree angle. If the river is 420 feet across, how far downstream will you end up?

Answer 1

Use
\[\tan \Theta = \frac{ y }{ x }\]

where

\[\Theta = 10\]

and x = 420

Plug in and solve for y