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## #2376 2012-12-25 21:06:17

bobbym

Online

### Re: Oral puzzles

Hi ganesh;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #2377 2012-12-26 17:36:09

ganesh
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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

julianthemath
Super Member

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### Re: Oral puzzles

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

Buy 1 for \$1, for \$0.50, for \$3, for \$2.50, for \$1.25, for \$0.25, and for \$5.

## #2379 2012-12-26 21:07:25

bobbym

Online

### 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.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #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
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón

## #2381 2012-12-27 18:33:28

ganesh
Moderator

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### 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

Online

### Re: Oral puzzles

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #2383 2012-12-28 11:50:14

julianthemath
Super 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.

Buy 1 for \$1, for \$0.50, for \$3, for \$2.50, for \$1.25, for \$0.25, and for \$5.

## #2384 2012-12-28 18:10:57

ganesh
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### 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

Online

### Re: Oral puzzles

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #2386 2012-12-29 16:54:07

ganesh
Moderator

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### 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

Online

### Re: Oral puzzles

Hi ganesh;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #2388 2012-12-30 17:43:58

ganesh
Moderator

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### 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

Online

### Re: Oral puzzles

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #2390 2012-12-31 17:45:44

ganesh
Moderator

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### 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

Online

### Re: Oral puzzles

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #2392 2013-01-01 17:45:50

ganesh
Moderator

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### 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

Online

### Re: Oral puzzles

Hi ganesh;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #2394 2013-01-02 18:00:23

ganesh
Moderator

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### 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.

scientia
Full Member

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## #2396 2013-01-03 02:33:37

bobbym

Online

### Re: Oral puzzles

Hi ganesh;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #2397 2013-01-03 18:21:22

ganesh
Moderator

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### 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

Online

### Re: Oral puzzles

Hi ganesh;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #2400 2013-01-04 17:27:26

ganesh
Moderator

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### 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.