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**niharika_kumar****Member**- From: Numeraland
- Registered: 2013-02-12
- Posts: 951

The number of all possible values of

, where , for which the system of equationshave a solution

with , is

P.S. please tell me how to solve this.

friendship is tan 90°.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,400

Is there a comma between y0 and z0?

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

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**niharika_kumar****Member**- From: Numeraland
- Registered: 2013-02-12
- Posts: 951

No

friendship is tan 90°.

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,315

bobbym wrote:

Is there a comma between y0 and z0?

It makes no difference.

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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,400

Hi;

I can only come up with these three but can not prove they are the only ones.

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,315

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

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

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**niharika_kumar****Member**- From: Numeraland
- Registered: 2013-02-12
- Posts: 951

How to get to that?

friendship is tan 90°.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,400

Hi;

I am not sure how to get that yet but there are some substitutions to try.

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,315

Multiply the second equation by yz then subtract itbfrom the third equation.

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

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