# Is the r in polar coordinates a vector?

• June 29th 2011, 01:18 AM
lamp23
Is the r in polar coordinates a vector?
When we introduced the idea that the r in (r,theta) can be negative, it made me wonder if the r is a vector. Is it?
• June 29th 2011, 01:29 AM
chisigma
Re: Is the r in polar coordinates a vector?
Quote:

Originally Posted by lamp23
When we introduced the idea that the r in (r,theta) can be negative, it made me wonder if the r is a vector. Is it?

No, it isn't... r is a real variable and a vector is a set of n real variables, with n>1...

Kind regards

$\chi$ $\sigma$