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User talk:Karl Stroetmann

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Welcome!

Hello, Karl Stroetmann, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are a few good links for newcomers:

I hope you enjoy editing here and being a Wikipedian! Please sign your name on talk pages using four tildes (~~~~); this will automatically produce your name and the date. If you need help, check out Wikipedia:Where to ask a question, ask me on my talk page, or place {{helpme}} on your talk page and someone will show up shortly to answer your questions. Again, welcome!  And perhaps you should log in :). Ach so: Willkommen! Lectonar 11:44, 4 October 2005 (UTC)[reply]

Hello[edit]

I've seen your important contributions for the article Recurrence relation. I'm looking for the general (non-iterative) non-trigonometric expression for the exact trigonometric constants of the form: , when n is natural (and is not given in advance). Do you know of any such general (non-iterative) non-trigonometric expression? (note that any exponential-expression-over-the-imaginaries is also excluded since it's trivially equivalent to a real-trigonometric expression).

  • Let me explain: if we choose n=1 then the term becomes "0", which is a simple (non-trigonometric) constant. If we choose n=2 then the term becomes , which is again a non-trigonometric expression. etc. etc. Generally, for every natural n, the term becomes a non-trigonometric expression. However, when n is not given in advance, then the very expression per se - is a trigonometric expression. I'm looking for the general (non-iterative) non-trigonometric expression equivalent to , when n is not given in advance. If not for the cosine - then for the sine or the tangent or the cotangent.

Eliko (talk) 08:26, 31 March 2008 (UTC)[reply]