In rectangular corr. 3i+j mean leght in x-direction =3 in y-3direction =1(adsbygoogle = window.adsbygoogle || []).push({});

However, how about in polar coorindate?

3r+1[itex]\theta[/itex] (r and [itex]\theta[/itex] are the unit verctor in polar coor., I don't know how to type it out, I hope you understand.)

Dose it mean a line with lenght 3 from origin and angle 1 radian from x-axis?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Unit vector in polar coorindate

**Physics Forums | Science Articles, Homework Help, Discussion**