okay i am not sure if my approach was right i just did what i could make out of this problem but i'l tell you what i did ....
try and make a triangle , with two corners as coordinates you have just mentioned and third this ( 45 N , 15 W ) .....so now its a basic triangle question ....find values of two sides one joining 45 N to 48 30 N and other side being calculated as 5 (ch long ) X 60 X cos mean lat .
Tan @ = Perpendicular / Base
you will get the angle as 45 something , add it 270 ( as 15 W is 270 of 10 W ) . It should add up to 315.2
SO GUYS WHAT DO YOU THINK IS IT THE RIGHT WAY OR I JUST GOT A FLUKE ???