Circular motion formulas, what does the angle without the function mean?

[Femme_physics]

http://img864.imageshack.us/img864/9467/tnua.jpg

I see an angle without a trigonometric function (delta theta - at the left side equations). I've never seen it before in a formula, and am not sure how to use it. Can anyone tell me how? Do I just translate degrees to radians and just plug the number I get in radians?

 

[Pengwuino]

Yes, typically you see everything in radians. So if you went through a quarter of a circle, you'd have $\Delta \theta = {{\pi} \over{2}}$

You could use degrees as long as everything is consistent (such as the angular acceleration being in degrees/sec for example).