red x bro.. can't see anything..
Find the component form of a vector v given the magnitude of u and u+v and the angles that u and u+v make with the positive x-axis.
sorry, fixed.....
||u||=2, = 230, ||u+v|| = 8 = 80
I can't find any problem like this in the book, instructor gave us this as a take home problem to work on....
If you have the magnitude of and along with their angles, it should be easy to get their component forms. Once you have that, is simply
You could also set it up as a triangle with sides of length and and angle You can use the law of cosines to get
Edit: Now that you have posted the actual values, I see that your problem is much simpler. and make the same angle with the -axis, which means that they are parallel. What does that tell you about