# After Eight Hours of Homework I Am Lost And Need Help

1. Jan 29, 2006

### CSpenceTTU

know there two problems are very easy, but for some reason I just cannot figure them out. Here are the two questions that I have. Does anybody know what the answers are to them?

If A = (25 m) x + (-12 m) y, and B = (2.0 m) x + (17 m) y, find the direction and magnitude of each of the following vectors.
(a) A
----?----° (counterclockwise from the +x-axis)
----?---- m
(b) B
----?----° (counterclockwise from the +x-axis)
----?---- m
(c) A + B
----?----° (counterclockwise from the +x-axis)
----?---- m

Last edited: Jan 29, 2006
2. Jan 29, 2006

### Staff: Mentor

What are the basic equations for convertion between rectangular and polar coordinates? Use those to solve these two problems.

3. Jan 29, 2006

### CSpenceTTU

i really have no idea where to start, what im looking for for a final answer..my mind is gone at this moment

4. Jan 29, 2006

### Staff: Mentor

You don't get final answers to homework questions here in the PF, Spence. You get hints and help, but you need to do most of the work. I'll say it one more time, look at the basic equations for converting between rectangular and polar coordinates. That's what you need to do. It doesn't take hours to learn that conversion....maybe 30 minutes tops.

5. Jan 29, 2006

### CSpenceTTU

have tried the magnitude of vector formula..still lost