Revision as of 14:38, 3 April 2007 by Carl McBride(talk | contribs)(New page: :<math> S_2 = \langle \frac{1}{2} (3 \cos^2 \theta_i -1) \rangle </math>)
Failed to parse (Conversion error. Server ("https://wikimedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle S_{2}=\langle {\frac {1}{2}}(3\cos ^{2}\theta _{i}-1)\rangle }