# Homework Help: Vector angle in a standard x-y coordinate system?

1. Sep 20, 2008

### robvba

A certain vector has x and y components that are equal in magnitude. Which of the following is a possible angle for this vector in a standard x-y coordinate system?

30°
180°
90°
60°
45°

Is this problem too simple or am i missing something? if the x and y components are equal in magnitude, than their vector will be the hypotenus...in this case being any of the above?

Thank you

2. Sep 20, 2008

### Redbelly98

Staff Emeritus
No, not any of the above. For most angles listed, the x and y components are unequal in magnitude.

3. Sep 20, 2008

### hage567

4. Sep 20, 2008

### robvba

so if one lies on the x plane and the other on the y plane the angle could be 45?

5. Sep 20, 2008

### LowlyPion

If they are equal, then either of the minor angles will be equal, which means ...

6. Sep 20, 2008

### robvba

cos()=sin()...()=45

7. Sep 20, 2008

### Redbelly98

Staff Emeritus
Yes, 45°.

By the way, what is this "x plane" and "y plane"? Everything is in the xy plane.

8. Sep 20, 2008

### robvba

Originaly i pictured two vectors of equal magnitued at different points on the xy plane.
thank you all