- #1

Clausius2

Science Advisor

Gold Member

- 1,440

- 6

But someone tell me how the log or tan terms are calculated here?

[tex] sech^{-1}\epsilon\sim log(2/\epsilon)-1/4\epsilon^2-...[/tex]

[tex] sin (2\epsilon)\sim 2tan\epsilon -2tan^3\epsilon+...[/tex]

Thanx.