OF ARTS AND SCIENCES, 



217 



TABLE FOR M AND wi (continued). 



COS ;f = sin w? cos (8 — 31) 



sin ;( cos \p' = sin m sin [8 — M) 



sin ^ sin \p' = cos m. 



If a exceeds 180°, cos m changes sign, and the supplements of m and 

 ilf are given in the table with argument a — 180°. 



