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#1 2014-07-02 12:31:00
Even more trig
If sin(B+C-A),sin(C+A-B) and sin(A+B-C)are in A.P.; then cot A,cot B,cot C are in -
(a) GP
(b) HP
(c) AP
(d) None of these.
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#3 2014-07-14 04:49:48
- anonimnystefy
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- From: Harlan's World
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Re: Even more trig
M says b. I haven't gotten to the solution analytically yet, though.
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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#4 2014-07-14 04:59:17
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
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Re: Even more trig
Hi;
May I see what you did with M to get that?
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#5 2014-07-14 05:01:47
- anonimnystefy
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Re: Even more trig
Sure!
FullSimplify[Sin[b + c - a] + Sin[a + b - c] == 2 Sin[a + c - b]]
2 Cos[a] Cos[c] Sin[b] == Cos[b] Sin[a + c]Last edited by anonimnystefy (2014-07-14 05:02:14)
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.
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#6 2014-07-14 05:12:48
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Even more trig
I do not understand it.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#7 2014-07-14 05:18:44
- anonimnystefy
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- From: Harlan's World
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Re: Even more trig
What do you not understand? I just rearranged the result a bit and got the answer.
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.
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#8 2014-07-14 05:20:56
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Even more trig
They are in AP?
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#9 2014-07-14 05:22:00
- anonimnystefy
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Re: Even more trig
The cot's are in HP.
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.
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#10 2014-07-14 05:26:16
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Even more trig
How are you representing the sines in AP is what I meant?
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#11 2014-07-14 05:31:10
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
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Re: Even more trig
The same as Nehushtan did.
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.
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#12 2014-07-14 05:32:36
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Even more trig
Okay, I see what you saying.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#13 2014-07-14 05:39:03
- anonimnystefy
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- From: Harlan's World
- Registered: 2011-05-23
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Re: Even more trig
Now to do it by hand...
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.
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#14 2014-07-14 05:46:37
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Even more trig
You have the result, now you just have to back engineer the how.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#15 2014-07-14 05:52:56
- anonimnystefy
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- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: Even more trig
I think I figured it out. I will post it when I write it out.
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.
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#16 2014-07-14 06:07:10
- anonimnystefy
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Re: Even more trig
Here's the solution.
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.
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#17 2014-07-14 06:16:13
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Even more trig
Hi;
Got to get off, will look at it when I get back. You did good.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#18 2014-07-14 06:21:17
- gAr
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Re: Even more trig
Expanding gives:
hence in H.P.
"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."
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#19 2014-07-14 06:27:55
- anonimnystefy
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- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: Even more trig
Hi bobbym
See you later!
Thanks.
Last edited by anonimnystefy (2014-07-14 06:29:01)
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.
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