Posted by **stacey graham** on Monday, April 26, 2010 at 1:28pm.

Two airplanes leave a airport at the same time , one going northwest ( bearing 315degrees) at 422 mph and the other going east at 341 mph. How far are the planes after 4 hours ?

Please help have no idea of how to solve?

- trig -
**Anonymous**, Monday, April 26, 2010 at 1:53pm
Any change you could clear the question? Is the question how far are the planes from each other?

If my assumption is correct the way to solve it would be via geometry.

East is 90 degrees.

The plane going 90 has cathetus with the lenght of 4*341.

The other one has 4*422.

The angle between these 2 cathetuses is 90+45=135 degrees.

Solve hypotenus.

(Cosine theorem, A^2+B^2-2ABcosx=C^2)

- trig -
**Anonymous**, Monday, April 26, 2010 at 1:59pm
Still the same guy here: ansver is 13055857/5186 miles.

## Answer This Question

## Related Questions

- trigonometry - Two planes leave teh same airport at the same time. one flies 20 ...
- Pre-Cal - Two airplanes take off from an airport at the same time. One travels ...
- math - 2 trains leave metropolos at same, one going south 50 mph the other east ...
- trig - Two Airplanes leave an airport at the same time on different runways. One...
- MATH - Two planes leave an airport at the same time, one flying east, the other ...
- maths - If two planes leave the same airport at 1:00 PM, how many miles apart ...
- Help!...Math... - Two cars leave town going opposite directions. One car is ...
- Pre-Calculus-Trig - Two trains depart simultaneously from the same station. The ...
- another speed - At 10:00 AM Two planes leave an airport. If the northbound plane...
- Math - Two boats leave a dock at the same time. One heads due east at 20 mph, ...

More Related Questions