15 Oct
2001
15 Oct
'01
9:39 p.m.
| sinh x = (exp(x) - exp(-x))/2 | cosh x = (exp(x) + exp(-x))/2 ... This looks pretty reasonable to me. We should have default methods for anything we can.
Why not provide defaults for the inverse functions as well? asinh x = log (x + sqrt (1+x*x)) acosh x = log (x + (x+1) * sqrt ((x-1)/(x+1))) atanh x = log ((x+1) / sqrt (1 - x*x)) -- Lennart