Change in unit vectors

1. Nov 18, 2011

khfrekek1992

1. The problem statement, all variables and given/known data

In cylindrical coordinates: what is d(theta-hat)/d(theta)?

2. Relevant equations

3. The attempt at a solution

I'm fairly certain it is -rho... without a direction? or is it -rho*theta-hat?

2. Nov 18, 2011

Staff: Mentor

$$-\hat r$$

3. Nov 18, 2011

khfrekek1992

ooh, awesome, that fixes the problem I was having.. thank you!!