I'm sorry, that posting was only intended for Bill, whom I hoped already knew what I was looking for. I'm looking for formulae only involving sinh, so the one with cosh doesn't work for me. Ditto for asinh in terms of asinh. At 02:50 PM 10/24/2007, Joshua Zucker wrote:
On 10/24/07, Henry Baker <hbaker1@pipeline.com> wrote:
sinh(x*2^k) = ?? sinh(x+y) =
These two are exactly the same as in the regular sine case, e.g. sinh(2x) = 2 sinh(x) cosh(x) sinh(x+y) = sinh(x) cosh(y) + sinh(y) cosh(x) and so on.
asinh(x*2^k) = ?? asinh(x+y) = ??
I don't know. Either use the ln formulation of these or just use the fact that asinh(x) = i * asin(-ix) to change your favorite asin formulas into asinh formulas. I don't have any favorite asin formulas to use to start with, though.
--Joshua Zucker