Question

what is the meaning of "ch" in this integral?

Answer 1

\[\int\limits_{}^{} \frac{ dx }{ chx }\]

Answer 2

I don't think I have seen this before. are c and h constants ? a function ?

Answer 3

my prof mentioned something like "hyperbolic something something"...(hard to grasp native polish speakers sometimes)...did i give you a clue? cause i don't know what's going on.

Answer 4

ok, then maybe they mean hyperbolic cosine
we would say cosh

http://en.wikipedia.org/wiki/Hyperbolic_cosine

Answer 5

yes! that's it!

Answer 6

I found this site
http://www.integraltec.com/math/math.php?f=sechx.html

Answer 7

thank you @phi