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## #51 2011-10-08 04:03:59

Howardroark
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### Re: Trigonometry

Hi ganesh,

I come from a civilization which has given the world the number 0..

## #52 2011-10-08 04:34:07

anonimnystefy
Real Member

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### Re: Trigonometry

hi ganesh

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

## #53 2011-10-09 00:34:00

ganesh
Moderator

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### Re: Trigonometry

Hi bobbym, Howardroark, and anonimnystefy,

The solution T#13 is perfect. Excellent!

T#14. If sin θ = cos θ and θ is acute, find the value of tan θ.

Character is who you are when no one is looking.

## #54 2011-10-09 00:43:12

bobbym

Online

### Re: Trigonometry

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.

## #55 2011-10-09 01:24:07

anonimnystefy
Real Member

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### Re: Trigonometry

hi ganesh

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

## #56 2011-10-09 22:44:28

ganesh
Moderator

Online

### Re: Trigonometry

Hi bobbym and anonimnystefy,

The solution T#14 is correct. Brilliant!

T#15. A flag staff stands on the top of one high tower. From a point on the ground the angle of elevation of the top of the flag staff is 60o and from the same point the angle of elevation of the top of the tower is 45o. Find the height of the flag staff.

Character is who you are when no one is looking.

## #57 2011-10-09 22:52:52

bobbym

Online

### Re: Trigonometry

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.

Maiya
Full Member

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Hello Ganesh;

## #59 2011-10-11 00:06:46

ganesh
Moderator

Online

### Re: Trigonometry

Hi bobbym and Maiya,

I am sorry I forgot to mention the height of the tower is 6 meters. Regretted!

T#16. A man standing on top of a multistoreyed building 45 meter high is looking at two advertising pillars on the same side whose angles of depression are 30 degrees and 45 degrees. What is the distance between the two pillars?

Character is who you are when no one is looking.

## #60 2011-10-11 00:21:38

bobbym

Online

### Re: Trigonometry

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.

## #61 2011-11-01 01:50:11

Arthur Bon Zavi
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### Re: Trigonometry

Last edited by Arthur Bon Zavi (2011-11-01 03:54:05)

In the heart of the night, when it's dark in the lights; I heard the loudest voice - a gun shot on the floor.

## #62 2011-11-01 22:38:21

ganesh
Moderator

Online

### Re: Trigonometry

Hi bobbym and Arthur Bon Zavi,

The solution T#16 is correct. (45(√3 - 1)). Excellent, bobbym!

T#17. A surveyor needs to determine the height of a light-house. He measures the angle at A and finds that tan A = 3/4. What is the height of the light-house, if A is 40 meters from the base?

Character is who you are when no one is looking.

## #63 2011-11-01 22:42:08

bobbym

Online

### Re: Trigonometry

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.

## #64 2011-11-01 22:43:40

Arthur Bon Zavi
Full Member

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### Re: Trigonometry

Can you show the working of #16 ?

In the heart of the night, when it's dark in the lights; I heard the loudest voice - a gun shot on the floor.

## #65 2011-11-01 23:04:55

bobbym

Online

### Re: Trigonometry

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.

Maiya
Full Member

Offline

## #67 2011-11-09 23:14:46

ganesh
Moderator

Online

### Re: Trigonometry

Hi bobbym and Maiya,

The solution T#17 is perfect. Excellent!

T#18. The angle of elevation of the top of a tower at a distance of 50 meters from its foot on horizontal plane is found to be 60o. Find the height of the tower.

Character is who you are when no one is looking.

## #68 2011-11-09 23:20:01

bobbym

Online

### Re: Trigonometry

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.

## #69 2011-11-10 21:55:14

Maiya
Full Member

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### Re: Trigonometry

Hello Ganesh;

Last edited by Maiya (2011-11-10 21:55:40)

## #70 2011-11-10 23:16:53

ganesh
Moderator

Online

### Re: Trigonometry

Hi bobbym and Maiya,

The solution T#18 is perfect. Excellent!

T#19. A ladder is placed against a wall such that it reaches the top of the wall of height 6 meters and the ladder is inclined at an angle of 60o with the ground. Find how far the ladder is from the foot of the wall.

Character is who you are when no one is looking.

## #71 2011-11-10 23:20:40

bobbym

Online

### Re: Trigonometry

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.

Maiya
Full Member

Offline

Hello Ganesh;

## #73 2011-11-11 22:57:40

ganesh
Moderator

Online

### Re: Trigonometry

Hi bobbym and Maiya,

The solution T#19 is correct. Brilliant!

T#20. From the top of a lighthouse, the angles of depression of two ships on either sides of the lighthouse are observed as 30o and 45o. If the height of the lighthouse is 200 meters, find the distance between the ships.

Character is who you are when no one is looking.

## #74 2011-11-11 23:05:01

bobbym

Online

### Re: Trigonometry

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.

Maiya
Full Member

Offline

hello Ganesh;