Posted by Subhotosh Khan on September 13, 2002 at 08:16:18:
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...
: i=sqrt(-1)
: sin(ix) = isinh(x)
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Use
Sin x = [e^(ix)-e^(-ix)]/(2i)
and
Sinh x = [e^(x)- e^(-x)]/2
It is very simple.....