Book:Murray R. Spiegel/Mathematical Handbook of Formulas and Tables/Chapter 14

Special Integrals
It is assumed in all cases that division by zero is excluded. Also, in the following, $u, v, w$ are functions of $x$; $a, b, p, q, n$ any constants, restricted if indicated; $e = 2.71828 \ldots$ is the natural base of logarithms; $\ln u$ denotes the natural logarithm of $u$ where it is assumed that $u > 0$ [in general, to extend formulas to cases where $u < 0$ as well, replace $\ln u$ with $\ln \left\vert{u}\right\vert$]; all angles are in radians; all constants of integration are omitted but implied.

Integrals Involving $\cosh a x$
=== Integrals Involving $\sinh a x$ and $\cosh a x$ ===