- #1
bajangal1
- 5
- 0
Homework Statement
A boat that can travel at 4.0km/h in still water crosses a river with a current of 2.0 km/h. At what angle must the boat be pointed upstream (that is, relative to its actual path) to go straight across the river?
Homework Equations
No equations were given but it seems like a simple trig problem, just can't get the right answer
The Attempt at a Solution
My first attempt i used inverse tan theta (4/2) and got an angle of 63
My second attempt i used inverse cos theta (2/4) and got an angle of 60
the actual answer is 30. Either there is a very big step I'm missing or I've drawn something horribly wrong.