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 ( )

and let R be the rotation through angle anticlockwise around Ov

CalculateR(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