Quote:
|
Originally Posted by nehalita
Quick question: I looked up the difference between cos and cosh and it says that cosh was the hyperbolic cosine. What is a hyperbolic cosine and when would it be helpful to use it?  (wow i think I've ended every post I've done here with a confused face...)
|
The hyperbolic cosine cosh(
x) = (e^
x + e^-
x)/2
It is very useful when evaluating certain integrals, but not really used outside of advanced calculus. A good description is
here.