title: What is the list of circle functions in APL?
body: <p>According to <a href="http://www.microapl.co.uk/apl/APL1_2.PDF" rel="nofollow">http://www.microapl.co.uk/apl/APL1_2.PDF</a>, there are circle function between ¯12 and 12. For example, functions 1, 2, and 3 are respectively <code>sin</code>, <code>cos</code>, and <code>tan</code>. I found on <a href="http://www.microapl.co.uk/apl_help/ch_020_020_240.htm" rel="nofollow">this reference</a> what are functions ¯7 to 7. However, I didn't find what are functions 8 to 12 (and their reciprocals). Could anybody point me what they are?</p>