Posted by Brad Paul on September 13, 2002 at 08:19:43:
In Reply to: Sinh - sin -Sinh - sin posted by Pi on September 13, 2002 at 08:03:56:
: Can anyone offer me a proof that...
: sin(ix) = isinh(x)
Both sin and sinh can be written as:
sin(z)=(ei z-e-i z)/(2 i)
Now plug in and go.
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