Math Is Fun Forum

Au101

Member

Registered: 2010-12-01

Posts: 353

Complex Transformations

Hi guys,

I'm completely confused by this question I have on complex transformations.

In order to do part a) - which I was able to do fine - I found that:

For part b) - then - I used this fact to say that:

But this does not give me the right answer. Upon looking-up how it was done, I was told that:

And I can't for the life of me see why this should be the case

Can anyone help? Thanks

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Complex Transformations

hi Au101

shouldn't it be u/(u²+v²)

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“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

Au101

Member

Registered: 2010-12-01

Posts: 353

Re: Complex Transformations

Hi anonimnystefy,

Yes, you're quite right - thanks, I hadn't noticed that mistake. Unfortunately, the rest is still wrong

Last edited by Au101 (2011-07-02 04:18:30)

gAr

Member

Registered: 2011-01-09

Posts: 3,482

Re: Complex Transformations

Hi Au101,

I get:

I don't see a reason why 2 should be there.

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"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

Au101

Member

Registered: 2010-12-01

Posts: 353

Re: Complex Transformations

Hmmm...That's exactly what I got

gAr

Member

Registered: 2011-01-09

Posts: 3,482

Re: Complex Transformations

Is there anything else explained with the answer?

---

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

Au101

Member

Registered: 2010-12-01

Posts: 353

Re: Complex Transformations

Hmmm, no I have reproduced the question in full and there is a worked solution which specifically says:

I assumed that I'd either completely misunderstood the question, or it was wrong. It's just that I'm used to seeing misprints in answer books, but an entirely illogical worked solution is something I wanted to check was the solution's mistake and not mine.

gAr

Member

Registered: 2011-01-09

Posts: 3,482

Re: Complex Transformations

Okay.
It's most probably a misprint.

---

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

Au101

Member

Registered: 2010-12-01

Posts: 353

Re: Complex Transformations

Thanks gAr - and anonimnystefy, of course.

gAr

Member

Registered: 2011-01-09

Posts: 3,482

Re: Complex Transformations

You're welcome!

---

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Complex Transformations

yw

---

“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.