(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

An airplane starting from airport A flies 247 km east, then 281 km at 29.3 west of north, and then 385 km north to arrive finally at airport B. The next day, another plane flies directly from A to B in a straight line.

In what direction should the pilot travel in this direct flight? Use the counter-clockwise as the positive angular direction from due east, between the limites of -180 and 180 degrees. Assume there is no wind during these flights. Answer in degrees.

part 2

HOw far will the pilot travel?

2. Relevant equations

Now i looked in my book and found this hefty equation/law:

r^2 = A^2 + B^2 -2ABCosTheta

I used this and found the answer to the second part, which is 639.493 km (I'm right because i checked it online)

Now I'm probably lost because i did the second part before the first part.

I get confused with direction involving angles because sometimes it's confusing if I have to use a negative sign or not, etc etc.

3. The attempt at a solution

This problem is hard to do it on the comp, but i did use the law twice in order to attain the final vector.

Can you get the angle direction? If i do find it, i will post the answer with directions.

Thanks :)

edit:

well i tried and used up all my possible tries so i got 0 pts on it but whatever, correct answer was 80.1422

damn.

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# Homework Help: Hi, need help with vectors in diff directions

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