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#2376 2012-12-24 22:06:17

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,791

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#2377 2012-12-25 18:36:09

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,818

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.

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#2378 2012-12-25 18:43:22

mathaholic
Member
From: Juliania
Registered: 2012-11-29
Posts: 2,870
Website

Re: Oral puzzles

Last edited by julianthemath (2012-12-26 12:12:06)


"What is the square root of 2? 1.4141592653589793238" Seriously, I thought it was that. Too round?
3.141592653589793238...

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#2379 2012-12-25 22:07:25

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,791

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 agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#2380 2012-12-25 22:11:06

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,603

Re: Oral puzzles

Hi ganesh

[hide=#1686]245[/hode]


“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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#2381 2012-12-26 19:33:28

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,818

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.

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#2382 2012-12-26 21:17:59

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,791

Re: Oral puzzles

Hi;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#2383 2012-12-27 12:50:14

mathaholic
Member
From: Juliania
Registered: 2012-11-29
Posts: 2,870
Website

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


"What is the square root of 2? 1.4141592653589793238" Seriously, I thought it was that. Too round?
3.141592653589793238...

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#2384 2012-12-27 19:10:57

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,818

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.

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#2385 2012-12-28 08:15:59

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,791

Re: Oral puzzles

Hi;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#2386 2012-12-28 17:54:07

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,818

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.

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#2387 2012-12-28 22:52:16

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,791

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#2388 2012-12-29 18:43:58

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,818

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.

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#2389 2012-12-30 01:08:07

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,791

Re: Oral puzzles

Hi;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#2390 2012-12-30 18:45:44

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,818

Re: Oral puzzles

Hi bobbym,

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

#1691. If tan A =

, find the value of tan A/(1 + tan[sup]2[/sup]A).


Character is who you are when no one is looking.

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#2391 2012-12-31 02:35:40

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,791

Re: Oral puzzles

Hi;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#2392 2012-12-31 18:45:50

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,818

Re: Oral puzzles

Hi bobbym,

The solution #1691 is correct. Good work!

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


Character is who you are when no one is looking.

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#2393 2013-01-01 01:53:09

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,791

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#2394 2013-01-01 19:00:23

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,818

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.

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#2395 2013-01-01 23:39:24

scientia
Member
Registered: 2009-11-13
Posts: 222

Re: Oral puzzles

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#2396 2013-01-02 03:33:37

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,791

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#2397 2013-01-02 19:21:22

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,818

Re: Oral puzzles

Hi scientia and bobbym,

The solution #1693 is correct. Neat work!

#1694. Find the value of cot[sup]2[/sup] θ - 1/sin[sup]2[/sup] θ.


Character is who you are when no one is looking.

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#2398 2013-01-02 23:07:47

scientia
Member
Registered: 2009-11-13
Posts: 222

Re: Oral puzzles

Last edited by scientia (2013-01-02 23:08:25)

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#2399 2013-01-03 02:24:30

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 88,791

Re: Oral puzzles

Hi ganesh;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#2400 2013-01-03 18:27:26

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,818

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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