
Re: Historyu of the integral of secant
Posted:
Feb 28, 2009 5:05 PM


In article <49A8C201.20705@netscape.net>, Stephen J. Herschkorn <sjherschko@netscape.net> wrote:
> What is the history of the trick to find the indefinite inteegral of the > secant function? Who first used it, and when?
I seem to remember it goes back to Mercator. He needed it for a map projection. Of course that is long before Newton & Leibniz put together tools to make it easy.
 G. A. Edgar http://www.math.ohiostate.edu/~edgar/

