Help Tried Several Times, but Can't Get Correct Solution

[tjbateh]

Homework Statement

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?

Homework Equations

The Attempt at a Solution

 

[Hurkyl]

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

 

[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.