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Brad Fitzpatrick

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Best CAPTCHA ever [Jul. 19th, 2007|10:52 am]
Brad Fitzpatrick
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A CAPTCHA gives you a little test to see if you're human, not a computer auto-generating accounts.

You know, this sort of crap:

But these guys have a way better one:

LinkReply

Comments:
From: evan
2007-07-19 09:22 pm (UTC)

Re: possibly embarrassing myself here

I meant "evaluate the derivative", and "the sin is +1" I meant "the derivative at that point is +1". Nikolas did it more thoroughly below.
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[User Picture]From: zarex
2007-07-19 09:45 pm (UTC)

Re: possibly embarrassing myself here

He messed up too. :) Must be a lot of programmers hanging around here, and not enough engineers.
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[User Picture]From: nibot
2007-07-19 10:18 pm (UTC)

Re: possibly embarrassing myself here

I think you both forgot to apply the chain rule. The derivative of 7Sin[6x] is 42 Cos[6x], etc.
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