I'm having trouble seeing how this piece of manipulation follows:
I can see that a factor of a 1/2 has been taken out but otherwise I'm unsure how to deal with the sinh(2arcsinh(wr))
Any help would be appreciated!
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It's because . In this case, .
BTW, are you sure that it's and not ?
I hadn't even noticed it said sin. I'm pretty much certain that's a typo and as you say, it's supposed to be arcsinh.
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