Primitive of Hyperbolic Cosine of a x by Hyperbolic Cosine of p x

Theorem

 * $\ds \int \cosh a x \cosh p x \rd x = \frac {\map \sinh {a + p} x} {2 \paren {a + p} } + \frac {\map \sinh {a - p} x} {2 \paren {a - p} } + C$

Also see

 * Primitive of $\sinh a x \sinh p x$
 * Primitive of $\sinh a x \cosh a x$
 * Primitive of $\sinh p x \cosh q x$