The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » sci.math.* » sci.math

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: Historyu of the integral of secant
Replies: 13   Last Post: Mar 3, 2009 3:11 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Michael Press

Posts: 2,137
Registered: 12/26/06
Re: Historyu of the integral of secant
Posted: Feb 28, 2009 1:22 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

In article <>,
"Stephen J. Herschkorn" <> wrote:

> What is the history of the trick to find the indefinite inteegral of the
> secant function? Who first used it, and when?

Which trick?
z = tan(x/2)?
Inverse gudermannian?

The correspondence predates the invention of the formal
integral calculus. The same numbers appeared while compiling
tables for the loxodrome and for log(tan(x)). I imagine
that after the integral calculus was invented, there was
no mystery about int sec(x) dx.

Michael Press

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.