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#2 Re: Help Me ! » trigonometry#2 » Yesterday 06:36:37

If there are x0, y0 and z0 for those, then those are the only ones, because sin(3 theta)=cos(3 theta)

#3 Re: Puzzles and Games » Marble Mix Up » Yesterday 06:33:21

That's not exactly a flaw. Maybe Harry just isn't quite a logician and is trying to deduce the colors from his own marbles and label only.

#4 Re: Help Me ! » trigonometry#2 » Yesterday 05:08:57

bobbym wrote:

Is there a comma between y0 and z0?

It makes no difference.

#7 Re: Help Me ! » Number of movements for Rubik's cube identity algorithm » 2014-07-22 07:15:25

Ah, yes, sorry.

Unrelated to the topic, have you gotten around to looking at Elaina's problems yet?

#8 Re: Help Me ! » Number of movements for Rubik's cube identity algorithm » 2014-07-22 06:16:33

Yeah, but it was easier to just find a pic on the interblag than to make it in GG or anywhere and upload it on imgur.

#9 Re: Help Me ! » Number of movements for Rubik's cube identity algorithm » 2014-07-22 05:13:37

Agnishom wrote:

Brilliant!

Now, what did you use to draw that cube?

Found it on the interwebs.

#10 Re: Help Me ! » Number of movements for Rubik's cube identity algorithm » 2014-07-22 01:56:36

There isn't such an algorithm.

Consider the corners of the cube:
cube.png

After each move, some of the odd labeled corners go into places of even labeled corners and vice versa. So, after any odd number of moves, odd corners end up in even numbered places and the even corners end up in odd numbered places, so such an algorithm is not possible.

#13 Re: Help Me ! » trigonometry » 2014-07-18 04:34:23

bobbym wrote:

There are still some problems that have persisted since 4.0.

Which problems?

#14 Re: Help Me ! » Is there any way I can check my proofs? » 2014-07-18 04:25:14

I'm sure that if you post the proofs here someone will be able to respond.

The one you posted looks good (assuming I got what you meant to write; some parentheses are missing), but it generally depends what you assume you already know is true, like you said.

#15 Re: Coder's Corner » Just another perl hacker » 2014-07-18 04:21:47

*are you

I'm a nerd, I would say. Which one do you think you are?

#17 Re: Help Me ! » Special Parts Of A Triangle » 2014-07-17 20:14:17

Hi harrychess

I'm getting 38 degrees.

#18 Re: Help Me ! » trigonometry » 2014-07-17 20:04:29

Yep! It's interesting, to say the least.

#19 Re: Help Me ! » trigonometry » 2014-07-17 07:02:57

The rest are not meaningless, just complex.

And, why not 10? smile

#20 Re: Coder's Corner » Just another perl hacker » 2014-07-17 06:44:46

Hm, does the first meaning of boffin vary from context to context, because a nerd is not the same as a geek.

#21 Re: Help Me ! » Invertible matrix » 2014-07-14 08:54:58

Isn't the transformation done on a matrix?

#23 Re: Help Me ! » Even more trig » 2014-07-14 06:27:55

Hi bobbym

See you later!

Thanks.

#25 Re: Help Me ! » Even more trig » 2014-07-14 05:52:56

I think I figured it out. I will post it when I write it out.

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