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#1 2014-03-04 02:08:18
Applied Trigonometry #2
If the angle of elevation of a cloud from a point h metres above the lake is θ and th angle of depression in the lake is 45 Degree, prove that the height of the cloud is h tan ( θ + 45°) metres.
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
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#2 2014-03-04 02:12:05
- Bob
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- Registered: 2010-06-20
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Re: Applied Trigonometry #2
I'll draw a diagram
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob 
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#3 2014-03-04 02:26:16
- Bob
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- Registered: 2010-06-20
- Posts: 10,643
Re: Applied Trigonometry #2
hi Agnishom,
I'm sure you don't really need my help with this one. My diagram shows the cloud at C. B is a point on the ground immediately below C, and C' is the reflection of the cloud in the lake so that BC = BC'. Also equal to this amount is OA, where O is the observer, h above the ground, where A is on the same level as O, so that AB = h
You want BC (or BC' or OA)
Just make every trig equation you can and it's bound to pop out somewhere along the way.
Oh yes and I've used t for theta because I don't know how to get Greek letters with this software or even if it's possible.
Happy trig-ing
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob
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#4 2014-03-04 04:00:39
Re: Applied Trigonometry #2
ust make every trig equation you can and it's bound to pop out somewhere along the way.
Only if it is true. Is it?
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
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#5 2014-03-04 04:33:22
- niharika_kumar
- Member
- From: Numeraland
- Registered: 2013-02-12
- Posts: 1,062
Re: Applied Trigonometry #2
trig-ing..
nice word bob.
friendship is tan 90°.
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#6 2014-03-04 05:18:21
- Bob
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- Registered: 2010-06-20
- Posts: 10,643
Re: Applied Trigonometry #2
Only if it is true. Is it?
Whhhhhaaaattttt! You mean you might be setting impossible problems? I hope not.
Anyway, I've just done it ... 5 lines. Huh!
Hint:
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob
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#7 2014-03-04 14:33:09
Re: Applied Trigonometry #2
Thanks, I needed the hint.
Its not me. My friends keep firing these impossible problems at me.
Just curious: If this was asked in a school test for 5 marks and your student wrote 5 lines, would you give him full credit?
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
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#8 2014-03-04 20:03:13
- Bob
- Administrator
- Registered: 2010-06-20
- Posts: 10,643
Re: Applied Trigonometry #2
If the lines were correct, then yes, full credit.
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob
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#9 2014-03-04 22:51:47
Re: Applied Trigonometry #2
Great! I wish you were in our school
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
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#10 2014-03-04 23:54:31
- Bob
- Administrator
- Registered: 2010-06-20
- Posts: 10,643
Re: Applied Trigonometry #2
Well, thank you for that.
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob
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