Will the real TeeEm please stand up!

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Reply 1380

TeeEm

Just uploaded in my site solutions to I.Y.G.B Special Paper Y.

any takers?

Original post by TeeEm

any takers?

What's up with the weird writing?

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Reply 1383

TeeEm

Original post by Mutleybm1996

What's up with the weird writing?

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it is from a foreign paper

Reply 1384

Gome44

Original post by TeeEm

any takers?

t=tan(x/2) might work, haven't tried it yet though

Edit: nvm, it probably does work but will take too long

(edited 8 years ago)

Reply 1385

TeeEm

Original post by Gome44

t=tan(x/2) might work, haven't tried it yet though

Edit: nvm, it probably does work but will take too long

I have an answer which I feel confident method wise ...
but by computer disagrees (it only gives numerical answer but it is different)

Reply 1386

Gome44

Original post by TeeEm

I have an answer which I feel confident method wise ...
but by computer disagrees (it only gives numerical answer but it is different)

Wolfram gives the answer 0.0549306 using a very long t substitution. I am personally getting nowhere with this question :L

Reply 1387

TeeEm

Original post by Gome44

Wolfram gives the answer 0.0549306 using a very long t substitution. I am personally getting nowhere with this question :L

that is what my computer gives but it does it numerically
but I am not getting this

Reply 1388

username1162972

Original post by TeeEm

that is what my computer gives but it does it numerically
but I am not getting this

Maybe a sub of x=pi/4-u will work.
Not quite actually.
Maybe post your method/solution?

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Reply 1389

TeeEm

Original post by physicsmaths

Maybe a sub of x=pi/4-u will work.
Not quite actually.
Maybe post your method/solution?

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I will scan and post

Reply 1390

TeeEm

Original post by Gome44

Wolfram gives the answer 0.0549306 using a very long t substitution. I am personally getting nowhere with this question :L

Original post by TeeEm

I will scan and post

Original post by physicsmaths

Maybe a sub of x=pi/4-u will work.
Not quite actually.
Maybe post your method/solution?

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Found my error ...
stupid thing on surds

I GOT IT!!!

ln3 / 20

(edited 8 years ago)

IMG.jpg381.8KB

Reply 1391

Gome44

Original post by TeeEm

Found my error ...
stupid thing on surds

I GOT IT!!!

ln3 / 20

I must admit that after struggling this morning on it I did google it, this was the first result http://www.youtube.com/watch?v=cdrBBJy71Tg

I tried the x=π/4-u sun yesterday but disregarded it after the initial sub :frown:

Reply 1392

username1162972

Original post by TeeEm

Found my error ...
stupid thing on surds

I GOT IT!!!

ln3 / 20

I seen the sub off an hunch, I gave up on it after seeing the bottom change in cos2x because i was some dummy variable type integral. Should have carried it on.

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Reply 1393

TeeEm

Original post by Gome44

Original post by physicsmaths

I seen the sub off an hunch, I gave up on it after seeing the bottom change in cos2x because i was some dummy variable type integral. Should have carried it on.

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Believe it or not this was from a standard A level equivalent paper!
and here people complain after a 61/75 for an A, in this years's C4 paper and make Hitler videos ...

Reply 1394

username1162972

Original post by TeeEm

Believe it or not this was from a standard A level equivalent paper!
and here people complain after a 61/75 for an A, in this years's C4 paper and make Hitler videos ...

Lol im still wondering where i dropped my 2 marks in C4.

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Reply 1395

fatart123

Original post by TeeEm

Believe it or not this was from a standard A level equivalent paper!
and here people complain after a 61/75 for an A, in this years's C4 paper and make Hitler videos ...

Maybe their spec explicitly teaches subs like that

Reply 1396

TeeEm

Original post by fatart123

Maybe their spec explicitly teaches subs like that

maybe you got a point

Reply 1397

TeeEm

Original post by A Slice of Pi

I've just tried Q15 on Special Paper X. I cannot seem to get the same answer as you, TeeEm. I ended up with

d = \sqrt{\frac{8\pi^2 - 32\pi +32}{32-8\pi + \pi^2}}

.
P.S. Just done Q17 on X - a lovely question (quick too!). Also, could you recommend a textbook that is good for more interestingly challenging problems, like these? I've always wondered how you come up with the ideas for these questions.

your answer is correct as I just wrote the solution to this question and remembered your post.

Reply 1398

TeeEm

Original post by 1 8 13 20 42

I get the same answer (as A Slice of Pi). Enjoyed that question, I spent much too long on it but had some interesting methods going on before settling on vectors (I'm guessing there is a more standard coordinate geometry method?) Was trying to figure out my wrong step for about half an hour or so...hopefully there isn't one :s-smilie:

Your answer is correct

I am writing the solutions for it now.
In fact there are several errors (typos) in this particular paper and a new version will be posted in my site when I finish the solutions.

Reply 1399

TeeEm

UPDATE ON I.Y.G.B SPECIAL PAPERS

So far uploaded in my site

Paper Z (final draft)
Paper Z (solutions)

Paper Y (final draft)
Paper Y (solutions)

Paper X (final draft)
Paper X (solutions)

Paper W (draft)

Note that until I write the solutions mark allocation may change