User ockam - MathOverflow most recent 30 from http://mathoverflow.net 2013-05-19T00:11:08Z http://mathoverflow.net/feeds/user/16552 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/41011/what-is-the-indefinite-sum-of-tanx/70677#70677 Answer by Ockam for What is the indefinite sum of tan(x)? Ockam 2011-07-18T21:30:18Z 2011-07-18T21:30:18Z <p>Dear Mr.DontKnowName</p> <p>This article is outdated. Now indefinite sum is completely reduced to indefinite integral. To be sure of it look at <a href="http://www.oddmathes.info/indefinitesum" rel="nofollow">http://www.oddmathes.info/indefinitesum</a> . I recommend to begin with examples. There is at the bottom of a page a button “Examples”. In a drop-down menu click “Instruction”, read it and then open “Example1”. The example is a live one. You can insert an analytic function at your choice and calculate it. In the example there are detailed instructions in commentaries before each step. When you become sure that the formula works you can look at the article to see why it works.</p> <p>Ascold.</p>