Shirt.Woot

It's Charlie Brown's shirt! Get it?

Yup, give that man an A in math.

Should be lower on the shirt.

thumperchick wrote:It's Charlie Brown's shirt! Get it?

I didn't. Thank you very much for explaining it!!!!!

EDIT:Someone doesn't know their sine functions. That should be y=3cos((x+0.7)*2)

Scratch that: TI-83 is giving me a different answer than Google. Looks like google is right though. Sorry if I sacred anybody.

Also, am I the only one that is missing the point? Inside joke?

Igannon wrote:Someone doesn't know their sine functions. That should be y=3cos((x+0.7)*2)

Sin is odd, and therefore symmetric about the line y=x.

Also, am I the only one that is missing the point? Inside joke?

The math checks out.

http://www.wolframalpha.com/input/?i=3*sin%28%28x%2B.7%29*2%29

cos(x) = sin(x + pi/2)

in radians of course

spilzer wrote:Yup, give that man an A in math.

Nope, a B at best. The drawn curve is not vertically symmetrical around y = 0, so it should be something more like this.

y = 2.5 * sin( (x + 0.7) * 2 ) + 0.5

Shouldn't it be a triangle wave around the belly?

ddrirc wrote:The math checks out.

http://www.wolframalpha.com/input/?i=3*sin%28%28x%2B.7%29*2%29

cos(x) = sin(x + pi/2)

Uhmmmm...not it doesn't, the shirt goes from 3 to -2. It should be from 3 to -3 on the Y axis.

That is some serious cryptomnesia in the write-up…

BigAssRat wrote:Uhmmmm...not it doesn't, the shirt goes from 3 to -2. It should be from 3 to -3 on the Y axis.

The peaks of the shirt are indeed lining up around +3, 0, and -3 like they should.

With no scale on the axes, pretty much any sine or cosine function here would work...as far as the amplitude and frequency goes. Chuck strikes me as a sin-with-a-phase-shift more than a cosine guy anyway.

Alternate Ending

You guys keep trying to explain what the shirt means, but all I read is "Wah, wah wah, wah wah wah."

Should be "- .7", not "+ .7".

aargh! Every post is causing calculus flashbacks. It's a nightmare!

rebekahdejmal wrote:The peaks of the shirt are indeed lining up around +3, 0, and -3 like they should.

They should be lining up around Y=+3 and Y=-3, because 3 is the amplitude in Y which affects it's height (in the y-direction). The previous comment is correct.

Great use of the lemon blank, which is solely underused! And now we know which woot shirt is being worn by the kid in the front row.

Great shirt, Nathan, very clever!

Chuck's shirt did NOT have a sine wave. It had a zig-zag sharp-cornered symbol.

steve

ger16 wrote:aargh! Every post is causing calculus flashbacks. It's a nightmare!

And, I got an "F" in calculus.

TWICE!

steve

I'm staying out of this except to say I see no numbers on those axes. For all we know those grid lines represent equal segments of 0.286.

Last math class I took was my third semester of calculus over 3! years ago. I'm studying engineering now, I haven't actually used stuff like sine functions in ages except when making nerdy comments on my friends' facebook walls.

It took me a moment but I totally saw the Charlie Brown shirt. Nice twist there.

But I really DO enjoy antihero comic strips and math! The Woot writers know me so well.

In any case, thanks for keeping an eye on the symmetry, fellow wooters. Nice catch!

Now watch this and drift off to sleep after watching that crazy ending to the Seahawks-Packers game!

Robtangle wrote:You guys keep trying to explain what the shirt means, but all I read is "Wah, wah wah, wah wah wah."

LOL!

Nice to see a sinusoid, and nice color use. If someone draws a triangle wave, as per our friend Charles, and includes its Fourier decomposition via its harmonics, I'll buy two. Continuity didn't stop the universe, and it shouldn't stop us.

ger16 wrote:aargh! Every post is causing calculus flashbacks. It's a nightmare!

This is trigonoetry

spitfire6006006 wrote:

This is trigonoetry

As an English major, I am now able hop into the conversation by correcting your spelling:

trigonometry

Anyone else hear Vince Guaraldi piano music and have a sudden craving for Zingers and other fine products from Dolly Madison?

Igannon wrote:EDIT:Someone doesn't know their sine functions. That should be y=3cos((x+0.7)*2)

Scratch that: TI-83 is giving me a different answer than Google. Looks like google is right though. Sorry if I sacred anybody.

Also, am I the only one that is missing the point? Inside joke?

maybe you have to adjust some settings? i hate when that happens :\

safyrejet wrote:I'm staying out of this except to say I see no numbers on those axes. For all we know those grid lines represent equal segments of 0.286.

Last math class I took was my third semester of calculus over 3! years ago. I'm studying engineering now, I haven't actually used stuff like sine functions in ages except when making nerdy comments on my friends' facebook walls.

It took me a moment but I totally saw the Charlie Brown shirt. Nice twist there.

Um... What kind of engineering are you studying? Because, I'm an Electrical Engineering student and we use that sine function stuff ALL the time.

Eucalyptus wrote:Nice to see a sinusoid, and nice color use. If someone draws a triangle wave, as per our friend Charles, and includes its Fourier decomposition via its harmonics, I'll buy two. Continuity didn't stop the universe, and it shouldn't stop us.

Agreed!

bluejester wrote:As an English major, I am now able hop into the conversation by correcting your spelling:

trigonometry

As an history major (and yes, "an" is correct even though I disagree with its use), I can now join the conversation by correcting your grammar: "...I am now able to..." or "...I am able now to..."

sgtgreeneusmc wrote:As an history major (and yes, "an" is correct even though I disagree with its use), I can now join the conversation by correcting your grammar: "...I am now able to..." or "...I am able now to..."

http://editingandwritingservices.com/a-or-an-before-words-beginning-with-h/ would disagree, sort of. I'm pretty indifferent on this one.

As an insomniac, I would like to mention that my grammar needs correcting from time to time as much as the next guy.

Or in Peanuts terms: "Waaah Wah Waaaah, Wah Wah."

bluejester wrote:As an English major, I am now able hop into the conversation by correcting your spelling:

trigonometry

But if he's correcting someone's mistake, shouldn't it be trigowrongometry?

Darn Nathan, you're like a clever idea factory. What a cool shirt.

First shirt I have seen on here where maybe,just maybe I could, with practice,replicate the artwork. Cool shirt.

couldn't you just say this was a cosine wave instead of a sine wave with a phase shift?

Sure, with no scale, technically any sine or cosine function works. However, it is pretty misleading to have a standard Cartesian plane with standard looking axes in bold but then draw the function such that the x axis could not be where y = 0.

It is misleading enough that I believe most people would think this is an error.

Wow. Lots of math blockheads today. Here, allow me to hold this football for you...