cosh(x) ------- sinh(x)
cosh(x)/sinh(x)
2 cosh (x) 1 - -------- 2 sinh (x)
/ 2 \ | 2*cosh (x)| -|2 - ----------|*cosh(x) | 2 | \ sinh (x) / -------------------------- sinh(x)
/ 2 \ 2 | 6*cosh (x)| cosh (x)*|5 - ----------| 2 | 2 | 3*cosh (x) \ sinh (x) / -2 + ---------- + ------------------------- 2 2 sinh (x) sinh (x)