Quaternions and Rotation?

I got this question in my Group Theory class and I'm not really sure how to go about it because I never really understood quaternions in the first place!

Let v be the unit vector ($\displaystyle $\frac{1}{\sqrt{3}}$,$-\frac{1}{\sqrt{3}}$,$\frac{1}{\sqrt{3}}$$)

and let R be the rotation through angle $\displaystyle $60^\circ$$ anticlockwise around Ov

Calculate *R*(1,0,0) by conjugating a quaternion.

Thanks for any help you can give me!

P.S. That one in the first part of the vector should be on top, I couldn't get the MATH tags to wrok properly