# Homework Help: Help! Tried Several Times, but Can't Get Correct Solution!

1. Sep 13, 2009

### tjbateh

1. The problem statement, all variables and given/known data

Three vectors a ,b c, and each have a magnitude of 42 m and lie in an xy plane. Their directions relative to the positive direction of the x axis are 29°, 197°, and 314°, respectively. What are (a) the magnitude and (b) the angle of the vector a + b + c, and (c) the magnitude and (d) the angle of a -b + c? What are (e) the magnitude and (f) the angle of a fourth vector d such that (a +b ) - ( c+ d) = 0?

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Sep 13, 2009

### Hurkyl

Staff Emeritus
Show your work, so that we may see where you are having trouble!

3. Sep 13, 2009

### tjbateh

I have put the vectors in their respective places, and have tried calculating the components using the Cos and Sin functions. However, I get stuck there. I have not really came to any answers. I don't think I have the full grasp of this material yet. Hoping someone could show me how to do this step by step. That would be wonderful.