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

A plane travels from base camp to lake A, 280 km away in the direction 20^{0}north of east. After that it flies to lake B which is 190 km at 30.0^{0}west of north from lake A Graphically determine the distance and direction from lake B to the base camp.

2. Relevant equations

I used law of cosines to find the distance. R=[tex]\sqrt{}(280^{2}+(190)^{2}-2x280x190xcos(80)[/tex] I got 310km for the distance and this part is correct but its the angle that I'm not getting right.

3. The attempt at a solution

I tried the law of sines for this and its not turning out right. I tried 190/320xsin80 = .585 Then I did arctan .585 and got 30.3 which is wrong. It is supposed to be 57.2^{0}South of West

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# Homework Help: Vector problem, determining angle

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