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#2376 2012-12-25 21:06:17

bobbym
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Re: Oral puzzles

Hi ganesh;


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.
 

#2377 2012-12-26 17:36:09

ganesh
Moderator

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Re: Oral puzzles

Hi bobbym,

The solution #1685 is correct. Good work!

#1686. Find 2 + 7 + 12 + ..... to 10 terms.


Character is who you are when no one is looking.
 

#2378 2012-12-26 17:43:22

mathaholic
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Re: Oral puzzles

Last edited by julianthemath (2012-12-27 11:12:06)


246 pages on Prime Numbers Wiki (+1)
 

#2379 2012-12-26 21:07:25

bobbym
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Re: Oral puzzles

Hi;



Yikes! I gave the 10th term instead of the sum!


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.
 

#2380 2012-12-26 21:11:06

anonimnystefy
Real Member

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Re: Oral puzzles

Hi ganesh

[hide=#1686]245[/hode]


The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
 

#2381 2012-12-27 18:33:28

ganesh
Moderator

Online

Re: Oral puzzles

Hi,

The solution #1686 is correct, julianthemath and anonimnystefy! Neat work!

#1687. In triangle PQR, angle Q = 90 degrees. Find tan P - cot R.


Character is who you are when no one is looking.
 

#2382 2012-12-27 20:17:59

bobbym
Administrator

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Re: Oral puzzles

Hi;


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.
 

#2383 2012-12-28 11:50:14

mathaholic
Star Member

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Re: Oral puzzles

I think this is a right triangle.
So, I will compute:
180-90=90
Split:45
I don't know if tan P is 45
and cot R is 45, too.
rolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyesrolleyes


246 pages on Prime Numbers Wiki (+1)
 

#2384 2012-12-28 18:10:57

ganesh
Moderator

Online

Re: Oral puzzles

Hi bobbym and julianthemath,

The solution #1687 is



Excellent, bobbym!

#1688. Given 15 cot A = 8, find sin A and sec A.


Character is who you are when no one is looking.
 

#2385 2012-12-29 07:15:59

bobbym
Administrator

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Re: Oral puzzles

Hi;


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.
 

#2386 2012-12-29 16:54:07

ganesh
Moderator

Online

Re: Oral puzzles

Hi bobbym,

The solution #1688 is perfect. Smart work!

#1689. If cot θ = 7/8, find the value of


Character is who you are when no one is looking.
 

#2387 2012-12-29 21:52:16

bobbym
Administrator

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Re: Oral puzzles

Hi ganesh;


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.
 

#2388 2012-12-30 17:43:58

ganesh
Moderator

Online

Re: Oral puzzles

Hi bobbym,

The solution #1689 is correct. Good work!

#1690. If

, find cos θ  and tan θ.


Character is who you are when no one is looking.
 

#2389 2012-12-31 00:08:07

bobbym
Administrator

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Re: Oral puzzles

Hi;


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.
 

#2390 2012-12-31 17:45:44

ganesh
Moderator

Online

Re: Oral puzzles

Hi bobbym,

The solution #1690 (both parts) is correct. Excellent!

#1691. If tan A =

, find the value of tan A/(1 + tan2A).


Character is who you are when no one is looking.
 

#2391 2013-01-01 01:35:40

bobbym
Administrator

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Re: Oral puzzles

Hi;


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.
 

#2392 2013-01-01 17:45:50

ganesh
Moderator

Online

Re: Oral puzzles

Hi bobbym,

The solution #1691 is correct. Good work!

#1692. Evaluate : (cos 45o)/(sec 30o + cosec 30o)


Character is who you are when no one is looking.
 

#2393 2013-01-02 00:53:09

bobbym
Administrator

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Re: Oral puzzles

Hi ganesh;


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.
 

#2394 2013-01-02 18:00:23

ganesh
Moderator

Online

Re: Oral puzzles

Hi bobbym,

The solution #1692 is perfect. Excellent!

#1693. If

, then find the value of cot A.


Character is who you are when no one is looking.
 

#2396 2013-01-03 02:33:37

bobbym
Administrator

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Re: Oral puzzles

Hi ganesh;


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.
 

#2397 2013-01-03 18:21:22

ganesh
Moderator

Online

Re: Oral puzzles

Hi scientia and bobbym,

The solution #1693 is correct. Neat work!

#1694. Find the value of cot2 θ - 1/sin2 θ.


Character is who you are when no one is looking.
 

#2398 2013-01-03 22:07:47

scientia
Full Member

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Re: Oral puzzles

Last edited by scientia (2013-01-03 22:08:25)

 

#2399 2013-01-04 01:24:30

bobbym
Administrator

Offline

Re: Oral puzzles

Hi ganesh;


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.
 

#2400 2013-01-04 17:27:26

ganesh
Moderator

Online

Re: Oral puzzles

Hi scientia and bobbym,

The solution #1694 is correct. Neat work!

#1695. If cos θ = 21/29, find the value of (sec θ)/(tan θ - sin θ).


Character is who you are when no one is looking.
 

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