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Re: [Phys-l] frequency: a modest proposal

There's more to it than that, as I've pointed out in a math arXiv:
the derivative of the sine is the cosine - only if the argument is in radians (doesn't work in degrees).

"Trust me. I have a lot of experience at this."
General Custer's unremembered message to his men,
just before leading them into the Little Big Horn Valley